diff --git a/configure.ac b/configure.ac
index 8fb460e6..23a7d979 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT(rtorrent, 0.5.0, jaris@ifi.uio.no)
+AC_INIT(rtorrent, 0.5.1, jaris@ifi.uio.no)
 
 AM_INIT_AUTOMAKE
 AM_CONFIG_HEADER(config.h)
diff --git a/rak/functional_fun.h b/rak/functional_fun.h
index c8ba1c5e..2c1c7baa 100644
--- a/rak/functional_fun.h
+++ b/rak/functional_fun.h
@@ -77,11 +77,12 @@ public:
   typedef Result                 result_type;
   typedef function_base0<Result> base_type;
 
-  bool is_valid() const { return m_base.get() != NULL; }
+  bool                is_valid() const     { return m_base.get() != NULL; }
 
-  void set(base_type* base) { m_base = std::auto_ptr<base_type>(base); }
+  void                set(base_type* base) { m_base = std::auto_ptr<base_type>(base); }
+  base_type*          release()            { return m_base.release(); }
 
-  Result operator () () { return (*m_base)(); }
+  Result operator () ()                    { return (*m_base)(); }
 
 private:
   std::auto_ptr<base_type> m_base;
@@ -93,16 +94,45 @@ public:
   typedef Result                       result_type;
   typedef function_base1<Result, Arg1> base_type;
 
-  bool is_valid() const { return m_base.get() != NULL; }
+  bool                is_valid() const     { return m_base.get() != NULL; }
 
-  void set(base_type* base) { m_base = std::auto_ptr<base_type>(base); }
+  void                set(base_type* base) { m_base = std::auto_ptr<base_type>(base); }
+  base_type*          release()            { return m_base.release(); }
 
-  Result operator () (Arg1 arg1) { return (*m_base)(arg1); }
+  Result operator () (Arg1 arg1)           { return (*m_base)(arg1); }
 
 private:
   std::auto_ptr<base_type> m_base;
 };
 
+template <typename Result>
+class ptr_fn0_t : public function_base0<Result> {
+public:
+  typedef Result (*Func)();
+
+  ptr_fn0_t(Func func) : m_func(func) {}
+  virtual ~ptr_fn0_t() {}
+  
+  virtual Result operator () () { return m_func(); }
+
+private:
+  Func    m_func;
+};
+
+template <typename Result, typename Arg1>
+class ptr_fn1_t : public function_base1<Result, Arg1> {
+public:
+  typedef Result (*Func)(Arg1);
+
+  ptr_fn1_t(Func func) : m_func(func) {}
+  virtual ~ptr_fn1_t() {}
+  
+  virtual Result operator () (Arg1 arg1) { return m_func(arg1); }
+
+private:
+  Func    m_func;
+};
+
 template <typename Object, typename Result>
 class mem_fn0_t : public function_base0<Result> {
 public:
@@ -180,20 +210,6 @@ private:
   const Arg1 m_arg1;
 };
 
-template <typename Result, typename Arg1>
-class ptr_fn1_t : public function_base1<Result, Arg1> {
-public:
-  typedef Result (*Func)(Arg1);
-
-  ptr_fn1_t(Func func) : m_func(func) {}
-  virtual ~ptr_fn1_t() {}
-  
-  virtual Result operator () (Arg1 arg1) { return m_func(arg1); }
-
-private:
-  Func    m_func;
-};
-
 template <typename Result, typename Arg1>
 class ptr_fn0_b1_t : public function_base0<Result> {
 public:
@@ -224,54 +240,137 @@ private:
   Arg1    m_arg1;
 };
 
+template <typename Result>
+class value_fn0_t : public function_base0<Result> {
+public:
+  value_fn0_t(const Result& val) : m_value(val) {}
+  
+  virtual Result operator () () { return m_value; }
+
+private:
+  Result  m_value;
+};
+
+template <typename Result, typename SrcResult>
+class convert_fn0_t : public function_base0<Result> {
+public:
+  typedef function0<SrcResult> src_type;
+
+  convert_fn0_t(typename src_type::base_type* object) { m_object.set(object); }
+  virtual ~convert_fn0_t() {}
+  
+  virtual Result operator () () {
+    return m_object();
+  }
+
+private:
+  src_type m_object;
+};
+
+template <typename Result, typename Arg1, typename SrcResult, typename SrcArg1>
+class convert_fn1_t : public function_base1<Result, Arg1> {
+public:
+  typedef function1<SrcResult, SrcArg1> src_type;
+
+  convert_fn1_t(typename src_type::base_type* object) { m_object.set(object); }
+  virtual ~convert_fn1_t() {}
+  
+  virtual Result operator () (Arg1 arg1) {
+    return m_object(arg1);
+  }
+
+private:
+  src_type m_object;
+};
+
+template <typename Result>
+inline function_base0<Result>*
+ptr_fn(Result (*func)()) {
+  return new ptr_fn0_t<Result>(func);
+}
+
+template <typename Arg1, typename Result>
+inline function_base1<Result, Arg1>*
+ptr_fn(Result (*func)(Arg1)) {
+  return new ptr_fn1_t<Result, Arg1>(func);
+}
+
 template <typename Result, typename Object>
-function_base0<Result>*
+inline function_base0<Result>*
 mem_fn(Object* object, Result (Object::*func)()) {
   return new mem_fn0_t<Object, Result>(object, func);
 }
 
 template <typename Arg1, typename Result, typename Object>
-function_base1<Result, Arg1>*
+inline function_base1<Result, Arg1>*
 mem_fn(Object* object, Result (Object::*func)(Arg1)) {
   return new mem_fn1_t<Object, Result, Arg1>(object, func);
 }
 
 template <typename Result, typename Object>
-function_base0<Result>*
+inline function_base0<Result>*
 mem_fn(const Object* object, Result (Object::*func)() const) {
   return new const_mem_fn0_t<Object, Result>(object, func);
 }
 
 template <typename Arg1, typename Result, typename Object>
-function_base1<Result, Arg1>*
+inline function_base1<Result, Arg1>*
 mem_fn(const Object* object, Result (Object::*func)(Arg1) const) {
   return new const_mem_fn1_t<Object, Result, Arg1>(object, func);
 }
 
 template <typename Arg1, typename Result, typename Object>
-function_base0<Result>*
+inline function_base0<Result>*
 bind_mem_fn(Object* object, Result (Object::*func)(Arg1), const Arg1 arg1) {
   return new mem_fn0_b1_t<Object, Result, Arg1>(object, func, arg1);
 }
 
 template <typename Arg1, typename Result>
-function_base1<Result, Arg1>*
-ptr_fn(Result (*func)(Arg1)) {
-  return new ptr_fn1_t<Result, Arg1>(func);
-}
-
-template <typename Arg1, typename Result>
-function_base0<Result>*
+inline function_base0<Result>*
 bind_ptr_fn(Result (*func)(Arg1), const Arg1 arg1) {
   return new ptr_fn0_b1_t<Result, Arg1>(func, arg1);
 }
 
 template <typename Arg1, typename Arg2, typename Result>
-function_base1<Result, Arg2>*
+inline function_base1<Result, Arg2>*
 bind_ptr_fn(Result (*func)(Arg1, Arg2), const Arg1 arg1) {
   return new ptr_fn1_b1_t<Result, Arg1, Arg2>(func, arg1);
 }
 
+template <typename Result>
+inline function_base0<Result>*
+value_fn(const Result& val) {
+  return new value_fn0_t<Result>(val);
+}
+
+template <typename Result, typename SrcResult>
+inline function_base0<Result>*
+convert_fn(function_base0<SrcResult>* src) {
+  return new convert_fn0_t<Result, SrcResult>(src);
+}
+
+// This overload ensures that if we try to convert to the same type,
+// it will optimize away the unneeded layer.
+template <typename Result>
+inline function_base0<Result>*
+convert_fn(function_base0<Result>* src) {
+  return src;
+}
+
+template <typename Result, typename Arg1, typename SrcResult, typename SrcArg1>
+inline function_base1<Result, Arg1>*
+convert_fn(function_base1<SrcResult, SrcArg1>* src) {
+  return new convert_fn1_t<Result, Arg1, SrcResult, SrcArg1>(src);
+}
+
+// This overload ensures that if we try to convert to the same type,
+// it will optimize away the unneeded layer.
+template <typename Result, typename Arg1>
+inline function_base1<Result, Arg1>*
+convert_fn(function_base1<Result, Arg1>* src) {
+  return src;
+}
+
 }
 
 #endif
diff --git a/rak/socket_address.h b/rak/socket_address.h
index dad2cfa0..0276c4e8 100644
--- a/rak/socket_address.h
+++ b/rak/socket_address.h
@@ -93,18 +93,21 @@ public:
   uint32_t            length() const;
 
   socket_address_inet*        sa_inet()                       { return reinterpret_cast<socket_address_inet*>(this); }
-  socket_address_inet6*       sa_inet6()                      { return reinterpret_cast<socket_address_inet6*>(this); }
-
   const socket_address_inet*  sa_inet() const                 { return reinterpret_cast<const socket_address_inet*>(this); }
-  const socket_address_inet6* sa_inet6() const                { return reinterpret_cast<const socket_address_inet6*>(this); }
 
   sockaddr*           c_sockaddr()                            { return &m_sa.m_sockaddr; }
   sockaddr_in*        c_sockaddr_inet()                       { return &m_sa.m_sockaddrInet; }
-  sockaddr_in6*       c_sockaddr_inet6()                      { return &m_sa.m_sockaddrInet6; }
 
   const sockaddr*     c_sockaddr() const                      { return &m_sa.m_sockaddr; }
   const sockaddr_in*  c_sockaddr_inet() const                 { return &m_sa.m_sockaddrInet; }
+
+#ifdef RAK_USE_INET6
+  socket_address_inet6*       sa_inet6()                      { return reinterpret_cast<socket_address_inet6*>(this); }
+  const socket_address_inet6* sa_inet6() const                { return reinterpret_cast<const socket_address_inet6*>(this); }
+
+  sockaddr_in6*       c_sockaddr_inet6()                      { return &m_sa.m_sockaddrInet6; }
   const sockaddr_in6* c_sockaddr_inet6() const                { return &m_sa.m_sockaddrInet6; }
+#endif
 
   // Copy a socket address which has the length 'length. Zero out any
   // extranous bytes and ensure it does not go beyond the size of this
@@ -123,7 +126,9 @@ private:
   union sa_union {
     sockaddr            m_sockaddr;
     sockaddr_in         m_sockaddrInet;
+#ifdef RAK_USE_INET6
     sockaddr_in6        m_sockaddrInet6;
+#endif
   };
 
   sa_union            m_sa;
diff --git a/src/control.cc b/src/control.cc
index f660f0ef..c47115ea 100644
--- a/src/control.cc
+++ b/src/control.cc
@@ -37,6 +37,7 @@
 #include "config.h"
 
 #include <unistd.h>
+#include <sys/stat.h>
 #include <torrent/connection_manager.h>
 
 #include "core/manager.h"
@@ -143,3 +144,10 @@ Control::handle_shutdown() {
   m_shutdownQuick = true;
   m_shutdownReceived = false;
 }
+
+void
+Control::set_umask(mode_t m) {
+  ::umask(m);
+
+  m_umask = m;
+}
diff --git a/src/control.h b/src/control.h
index dfa5e7cb..66a26136 100644
--- a/src/control.h
+++ b/src/control.h
@@ -38,6 +38,7 @@
 #define RTORRENT_CONTROL_H
 
 #include <inttypes.h>
+#include <sys/types.h>
 #include <rak/timer.h>
 #include <rak/priority_queue_default.h>
 #include <torrent/torrent.h>
@@ -96,6 +97,9 @@ public:
   uint64_t            tick() const                  { return m_tick; }
   void                inc_tick()                    { m_tick++; }
 
+  mode_t              umask() const                 { return m_umask; }
+  void                set_umask(mode_t m);
+
 private:
   Control(const Control&);
   void operator = (const Control&);
@@ -115,6 +119,7 @@ private:
   display::ClientInfo* m_clientInfo;
 
   uint64_t            m_tick;
+  mode_t              m_umask;
 
   rak::priority_item  m_taskShutdown;
 };
diff --git a/src/core/download.cc b/src/core/download.cc
index b6a61aeb..08a7cdff 100644
--- a/src/core/download.cc
+++ b/src/core/download.cc
@@ -65,28 +65,25 @@ Download::Download(download_type d) :
 
   m_download.signal_chunk_failed(sigc::mem_fun(*this, &Download::receive_chunk_failed));
 
-  m_variables.insert("connection_current", new utils::VariableSlotString<const char*, const std::string&>(rak::mem_fn(this, &Download::connection_current),
-													  rak::mem_fn(this, &Download::set_connection_current)));
+  m_variables.insert("connection_current", new utils::VariableStringSlot(rak::mem_fn(this, &Download::connection_current),
+									 rak::mem_fn(this, &Download::set_connection_current)));
+
   m_variables.insert("connection_leech",   new utils::VariableAny(connection_type_to_string(download_type::CONNECTION_LEECH)));
   m_variables.insert("connection_seed",    new utils::VariableAny(connection_type_to_string(download_type::CONNECTION_SEED)));
   m_variables.insert("state",              new utils::VariableObject(bencode(), "rtorrent", "state", torrent::Object::TYPE_STRING));
   m_variables.insert("tied_to_file",       new utils::VariableObject(bencode(), "rtorrent", "tied_to_file", torrent::Object::TYPE_STRING));
 
-  m_variables.insert("directory",          new utils::VariableSlotString<const std::string&>(rak::mem_fn(&m_fileList, &torrent::FileList::root_dir),
-											     rak::mem_fn(this, &Download::set_root_directory)));
+  m_variables.insert("directory",          new utils::VariableStringSlot(rak::mem_fn(&m_fileList, &torrent::FileList::root_dir),
+									 rak::mem_fn(this, &Download::set_root_directory)));
 
-  m_variables.insert("min_peers",          new utils::VariableSlotValue<uint32_t, uint32_t>(rak::mem_fn(&m_download, &download_type::peers_min),
-											    rak::mem_fn(&m_download, &download_type::set_peers_min),
-											    "%u"));
-  m_variables.insert("max_peers",          new utils::VariableSlotValue<uint32_t, uint32_t>(rak::mem_fn(&m_download, &download_type::peers_max),
-											    rak::mem_fn(&m_download, &download_type::set_peers_max),
-											    "%u"));
-  m_variables.insert("max_uploads",        new utils::VariableSlotValue<uint32_t, uint32_t>(rak::mem_fn(&m_download, &download_type::uploads_max),
-											    rak::mem_fn(&m_download, &download_type::set_uploads_max),
-											    "%u"));
-  m_variables.insert("priority",           new utils::VariableSlotValue<uint32_t, uint32_t>(rak::mem_fn(this, &Download::priority),
-											    rak::mem_fn(this, &Download::set_priority),
-											    "%u"));
+  m_variables.insert("min_peers",          new utils::VariableValueSlot(rak::mem_fn(&m_download, &download_type::peers_min),
+									rak::mem_fn(&m_download, &download_type::set_peers_min)));
+  m_variables.insert("max_peers",          new utils::VariableValueSlot(rak::mem_fn(&m_download, &download_type::peers_max),
+									rak::mem_fn(&m_download, &download_type::set_peers_max)));
+  m_variables.insert("max_uploads",        new utils::VariableValueSlot(rak::mem_fn(&m_download, &download_type::uploads_max),
+									rak::mem_fn(&m_download, &download_type::set_uploads_max)));
+  m_variables.insert("priority",           new utils::VariableValueSlot(rak::mem_fn(this, &Download::priority),
+									rak::mem_fn(this, &Download::set_priority)));
 }
 
 Download::~Download() {
diff --git a/src/core/manager.cc b/src/core/manager.cc
index 72c0afe8..8bbeb3ae 100644
--- a/src/core/manager.cc
+++ b/src/core/manager.cc
@@ -239,6 +239,11 @@ Manager::listen_open() {
   throw torrent::input_error("Could not open/bind a port for listening: " + std::string(rak::error_number::current().c_str()));
 }
 
+std::string
+Manager::bind_address() const {
+  return rak::socket_address::cast_from(torrent::connection_manager()->bind_address())->address_str();
+}
+
 void
 Manager::set_bind_address(const std::string& addr) {
   int err;
@@ -268,6 +273,11 @@ Manager::set_bind_address(const std::string& addr) {
   }
 }
 
+std::string
+Manager::local_address() const {
+  return rak::socket_address::cast_from(torrent::connection_manager()->local_address())->address_str();
+}
+
 void
 Manager::set_local_address(const std::string& addr) {
   int err;
diff --git a/src/core/manager.h b/src/core/manager.h
index 35be6945..3371092f 100644
--- a/src/core/manager.h
+++ b/src/core/manager.h
@@ -78,7 +78,10 @@ public:
 
   void                listen_open();
 
+  std::string         bind_address() const;
   void                set_bind_address(const std::string& addr);
+
+  std::string         local_address() const;
   void                set_local_address(const std::string& addr);
 
   void                shutdown(bool force);
diff --git a/src/option_handler_rules.cc b/src/option_handler_rules.cc
index 05ec6e61..4d9ccd55 100644
--- a/src/option_handler_rules.cc
+++ b/src/option_handler_rules.cc
@@ -63,11 +63,6 @@
 #include "option_handler_rules.h"
 #include "command_scheduler.h"
 
-void
-apply_umask(int arg) {
-  umask(arg);
-}
-
 void
 apply_working_directory(const std::string& path) {
   if (chdir(path.c_str()) != 0)
@@ -209,7 +204,8 @@ initialize_option_handler(Control* c) {
 
   variables->insert("tracker_dump",          new utils::VariableAny(std::string()));
 
-  variables->insert("session",               new utils::VariableSlotString<>(NULL, rak::mem_fn(&control->core()->download_store(), &core::DownloadStore::set_path)));
+  variables->insert("session",               new utils::VariableStringSlot(rak::mem_fn(&control->core()->download_store(), &core::DownloadStore::path),
+									   rak::mem_fn(&control->core()->download_store(), &core::DownloadStore::set_path)));
   variables->insert("session_lock",          new utils::VariableAny("yes"));
   variables->insert("session_on_completion", new utils::VariableAny("yes"));
 
@@ -217,52 +213,59 @@ initialize_option_handler(Control* c) {
   variables->insert("connection_seed",       new utils::VariableAny("seed"));
 
   variables->insert("directory",             new utils::VariableAny("./"));
-  variables->insert("working_directory",     new utils::VariableSlotString<>(NULL, rak::ptr_fn(&apply_working_directory)));
-  variables->insert("bind",                  new utils::VariableSlotString<>(NULL, rak::mem_fn(control->core(), &core::Manager::set_bind_address)));
-  variables->insert("ip",                    new utils::VariableSlotString<>(NULL, rak::mem_fn(control->core(), &core::Manager::set_local_address)));
 
-  variables->insert("tos",                   new utils::VariableSlotString<>(NULL, rak::ptr_fn(&apply_tos)));
+  variables->insert("working_directory",     new utils::VariableStringSlot(rak::value_fn(std::string()), rak::ptr_fn(&apply_working_directory)));
+  variables->insert("tos",                   new utils::VariableStringSlot(rak::value_fn(std::string()), rak::ptr_fn(&apply_tos)));
+
+  variables->insert("bind",                  new utils::VariableStringSlot(rak::mem_fn(control->core(), &core::Manager::bind_address),
+									   rak::mem_fn(control->core(), &core::Manager::set_bind_address)));
+  variables->insert("ip",                    new utils::VariableStringSlot(rak::mem_fn(control->core(), &core::Manager::local_address),
+									   rak::mem_fn(control->core(), &core::Manager::set_local_address)));
 
   variables->insert("min_peers",             new utils::VariableValue(40));
   variables->insert("max_peers",             new utils::VariableValue(100));
   variables->insert("max_uploads",           new utils::VariableValue(15));
 
-  variables->insert("download_rate",         new utils::VariableSlotValue<uint32_t, unsigned int>(NULL, rak::mem_fn(control->ui(), &ui::Root::set_down_throttle), "%i"));
-  variables->insert("upload_rate",           new utils::VariableSlotValue<uint32_t, unsigned int>(NULL, rak::mem_fn(control->ui(), &ui::Root::set_up_throttle), "%i"));
+  variables->insert("download_rate",         new utils::VariableValueSlot(rak::ptr_fn(&torrent::down_throttle), rak::mem_fn(control->ui(), &ui::Root::set_down_throttle_i64),
+									  0, (1 << 10)));
+  variables->insert("upload_rate",           new utils::VariableValueSlot(rak::ptr_fn(&torrent::up_throttle), rak::mem_fn(control->ui(), &ui::Root::set_up_throttle_i64),
+									  0, (1 << 10)));
 
-  variables->insert("hash_max_tries",        new utils::VariableSlotValue<int, uint32_t>(NULL, rak::ptr_fn(&torrent::set_hash_max_tries), "%i"));
-  variables->insert("max_open_files",        new utils::VariableSlotValue<int, uint32_t>(NULL, rak::ptr_fn(&torrent::set_max_open_files), "%i"));
-  variables->insert("max_open_sockets",      new utils::VariableSlotValue<int, uint32_t>(NULL, rak::ptr_fn(&torrent::set_max_open_sockets), "%i"));
+  variables->insert("hash_max_tries",        new utils::VariableValueSlot(rak::ptr_fn(&torrent::hash_max_tries), rak::ptr_fn(&torrent::set_hash_max_tries)));
+  variables->insert("max_open_files",        new utils::VariableValueSlot(rak::ptr_fn(&torrent::max_open_files), rak::ptr_fn(&torrent::set_max_open_files)));
+  variables->insert("max_open_sockets",      new utils::VariableValueSlot(rak::ptr_fn(&torrent::max_open_sockets), rak::ptr_fn(&torrent::set_max_open_sockets)));
 
-  variables->insert("print",                 new utils::VariableSlotString<>(NULL, rak::mem_fn(control->core(), &core::Manager::push_log)));
-  variables->insert("import",                new utils::VariableSlotString<>(NULL, rak::mem_fn(control->variable(), &utils::VariableMap::process_file_throw)));
-  variables->insert("try_import",            new utils::VariableSlotString<>(NULL, rak::mem_fn(control->variable(), &utils::VariableMap::process_file_nothrow)));
+  variables->insert("print",                 new utils::VariableStringSlot(rak::value_fn(std::string()),
+									   rak::mem_fn(control->core(), &core::Manager::push_log)));
+  variables->insert("import",                new utils::VariableStringSlot(rak::value_fn(std::string()),
+									   rak::mem_fn(control->variable(), &utils::VariableMap::process_file_throw)));
+  variables->insert("try_import",            new utils::VariableStringSlot(rak::value_fn(std::string()),
+									   rak::mem_fn(control->variable(), &utils::VariableMap::process_file_nothrow)));
 
-  variables->insert("schedule",              new utils::VariableSlotString<>(NULL, rak::mem_fn<const std::string&>(c->command_scheduler(), &CommandScheduler::parse)));
-  variables->insert("schedule_remove",       new utils::VariableSlotString<>(NULL, rak::mem_fn<const std::string&>(c->command_scheduler(), &CommandScheduler::erase)));
+  variables->insert("schedule",              new utils::VariableStringSlot(rak::value_fn(std::string()),
+									   rak::mem_fn<const std::string&>(c->command_scheduler(), &CommandScheduler::parse)));
+  variables->insert("schedule_remove",       new utils::VariableStringSlot(rak::value_fn(std::string()),
+									   rak::mem_fn<const std::string&>(c->command_scheduler(), &CommandScheduler::erase)));
 
-  variables->insert("send_buffer_size",      new utils::VariableSlotValue<int, uint32_t>(NULL, rak::mem_fn(torrent::connection_manager(),
-													   &torrent::ConnectionManager::set_send_buffer_size), "%u"));
+  variables->insert("send_buffer_size",      new utils::VariableValueSlot(rak::mem_fn(torrent::connection_manager(), &torrent::ConnectionManager::send_buffer_size),
+									  rak::mem_fn(torrent::connection_manager(), &torrent::ConnectionManager::set_send_buffer_size)));
   
-  variables->insert("receive_buffer_size",   new utils::VariableSlotValue<int, uint32_t>(NULL, rak::mem_fn(torrent::connection_manager(),
-													   &torrent::ConnectionManager::set_receive_buffer_size), "%u"));
+  variables->insert("receive_buffer_size",   new utils::VariableValueSlot(rak::mem_fn(torrent::connection_manager(), &torrent::ConnectionManager::receive_buffer_size),
+									  rak::mem_fn(torrent::connection_manager(), &torrent::ConnectionManager::set_receive_buffer_size)));
   
-  // Old.
-  variables->insert("port_range",          new utils::VariableSlotString<>(NULL, rak::bind_ptr_fn(&apply_port_range, c)));
+  variables->insert("port_range",            new utils::VariableStringSlot(rak::value_fn(std::string()), rak::bind_ptr_fn(&apply_port_range, c)));
 
-  variables->insert("hash_read_ahead",     new utils::VariableSlotValue<int, int>(NULL, rak::bind_ptr_fn(&apply_hash_read_ahead, c), "%i"));
-  variables->insert("hash_interval",       new utils::VariableSlotValue<int, int>(NULL, rak::bind_ptr_fn(&apply_hash_interval, c), "%i"));
+  variables->insert("hash_read_ahead",       new utils::VariableValueSlot(rak::ptr_fn(torrent::hash_read_ahead), rak::bind_ptr_fn(&apply_hash_read_ahead, c)));
+  variables->insert("hash_interval",         new utils::VariableValueSlot(rak::ptr_fn(torrent::hash_interval), rak::bind_ptr_fn(&apply_hash_interval, c)));
 
-  variables->insert("umask",               new utils::VariableSlotValue<int, int>(NULL, rak::ptr_fn(&apply_umask), "%o"));
+  variables->insert("umask",                 new utils::VariableValueSlot(rak::mem_fn(control, &Control::umask), rak::mem_fn(control, &Control::set_umask), 8));
 
-  variables->insert("load",                new utils::VariableSlotString<>(NULL, rak::bind_ptr_fn(&apply_load, c)));
-  variables->insert("load_start",          new utils::VariableSlotString<>(NULL, rak::bind_ptr_fn(&apply_load_start, c)));
-  variables->insert("stop_untied",         new utils::VariableSlotString<>(NULL, rak::bind_ptr_fn(&apply_stop_untied, c)));
-  variables->insert("remove_untied",       new utils::VariableSlotString<>(NULL, rak::bind_ptr_fn(&apply_remove_untied, c)));
+  variables->insert("load",                  new utils::VariableStringSlot(rak::value_fn(std::string()), rak::bind_ptr_fn(&apply_load, c)));
+  variables->insert("load_start",            new utils::VariableStringSlot(rak::value_fn(std::string()), rak::bind_ptr_fn(&apply_load_start, c)));
+  variables->insert("stop_untied",           new utils::VariableStringSlot(rak::value_fn(std::string()), rak::bind_ptr_fn(&apply_stop_untied, c)));
+  variables->insert("remove_untied",         new utils::VariableStringSlot(rak::value_fn(std::string()), rak::bind_ptr_fn(&apply_remove_untied, c)));
 
-  variables->insert("enable_trackers",     new utils::VariableSlotString<>(NULL, rak::bind_ptr_fn(&apply_enable_trackers, c)));
-
-  variables->insert("encoding_list",       new utils::VariableSlotString<>(NULL, rak::bind_ptr_fn(&apply_encoding_list, c)));
-
-  variables->insert("http_proxy",          new utils::VariableSlotString<>(NULL, rak::bind_ptr_fn(&apply_http_proxy, c)));
+  variables->insert("enable_trackers",       new utils::VariableStringSlot(rak::value_fn(std::string()), rak::bind_ptr_fn(&apply_enable_trackers, c)));
+  variables->insert("encoding_list",         new utils::VariableStringSlot(rak::value_fn(std::string()), rak::bind_ptr_fn(&apply_encoding_list, c)));
+  variables->insert("http_proxy",            new utils::VariableStringSlot(rak::value_fn(std::string()), rak::bind_ptr_fn(&apply_http_proxy, c)));
 }
diff --git a/src/ui/root.h b/src/ui/root.h
index aac6906b..7f5ce4c5 100644
--- a/src/ui/root.h
+++ b/src/ui/root.h
@@ -37,6 +37,7 @@
 #ifndef RTORRENT_UI_ROOT_H
 #define RTORRENT_UI_ROOT_H
 
+#include <inttypes.h>
 #include "input/bindings.h"
 
 class Control;
@@ -63,6 +64,10 @@ public:
   void                set_down_throttle(unsigned int throttle);
   void                set_up_throttle(unsigned int throttle);
 
+  // Rename to raw or something, make base function.
+  void                set_down_throttle_i64(int64_t throttle) { set_down_throttle(throttle >> 10); }
+  void                set_up_throttle_i64(int64_t throttle)   { set_up_throttle(throttle >> 10); }
+
   void                adjust_down_throttle(int throttle);
   void                adjust_up_throttle(int throttle);
 
diff --git a/src/utils/Makefile.am b/src/utils/Makefile.am
index 88b80a6b..07f5b5fb 100644
--- a/src/utils/Makefile.am
+++ b/src/utils/Makefile.am
@@ -6,6 +6,7 @@ libsub_utils_a_SOURCES = \
 	list_focus.h \
 	lockfile.cc \
 	lockfile.h \
+	variable.cc \
 	variable.h \
 	variable_generic.cc \
 	variable_generic.h \
diff --git a/src/utils/variable.cc b/src/utils/variable.cc
new file mode 100644
index 00000000..c3e534a5
--- /dev/null
+++ b/src/utils/variable.cc
@@ -0,0 +1,92 @@
+// rTorrent - BitTorrent client
+// Copyright (C) 2006, Jari Sundell
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+// In addition, as a special exception, the copyright holders give
+// permission to link the code of portions of this program with the
+// OpenSSL library under certain conditions as described in each
+// individual source file, and distribute linked combinations
+// including the two.
+//
+// You must obey the GNU General Public License in all respects for
+// all of the code used other than OpenSSL.  If you modify file(s)
+// with this exception, you may extend this exception to your version
+// of the file(s), but you are not obligated to do so.  If you do not
+// wish to do so, delete this exception statement from your version.
+// If you delete this exception statement from all source files in the
+// program, then also delete it here.
+//
+// Contact:  Jari Sundell <jaris@ifi.uio.no>
+//
+//           Skomakerveien 33
+//           3185 Skoppum, NORWAY
+
+#include "config.h"
+
+#include <torrent/exceptions.h>
+
+#include "variable.h"
+
+namespace utils {
+
+const torrent::Object Variable::m_emptyObject;
+
+const char*
+Variable::string_to_value_unit(const char* pos, value_type* value, int base, int unit) {
+  char* last;
+
+  *value = strtoll(pos, &last, base);
+
+  if (last == pos)
+    throw torrent::input_error("Could not convert string to value.");
+
+  switch (*last) {
+  case 'b':
+  case 'B':
+    ++last;
+    break;
+
+  case 'k':
+  case 'K':
+    *value = *value << 10;
+    ++last;
+    break;
+
+  case 'm':
+  case 'M':
+    *value = *value << 20;
+    ++last;
+    break;
+
+  case 'g':
+  case 'G':
+    *value = *value << 30;
+    ++last;
+    break;
+
+  case ' ':
+  case '\0':
+    *value = *value * unit;
+    break;
+
+  default:
+    throw torrent::input_error("Could not parse value.");
+  }
+
+  return last;
+}
+
+}
diff --git a/src/utils/variable.h b/src/utils/variable.h
index 5ecc241f..dfd3f37b 100644
--- a/src/utils/variable.h
+++ b/src/utils/variable.h
@@ -37,25 +37,33 @@
 #ifndef RTORRENT_UTILS_VARIABLE_H
 #define RTORRENT_UTILS_VARIABLE_H
 
-#include <string>
-
-namespace torrent {
-  class Object;
-}
+#include <torrent/object.h>
 
 namespace utils {
 
 class Variable {
 public:
+  typedef torrent::Object::value_type  value_type;
+  typedef torrent::Object::string_type string_type;
+  typedef torrent::Object::list_type   list_type;
+  typedef torrent::Object::map_type    map_type;
+  typedef torrent::Object::key_type    key_type;
+
   Variable() {}
   virtual ~Variable() {}
 
   virtual const torrent::Object& get() = 0;
-  virtual void                    set(const torrent::Object& arg) = 0;
+  virtual void                   set(const torrent::Object& arg) = 0;
 
 protected:
   Variable(const Variable&);
   void operator = (const Variable&);
+
+  static const char*  string_to_value_unit(const char* pos, value_type* value, int base, int unit);
+
+  // Temporary hack, until torrent::Object is extended to allow
+  // references so we can return a copy, not a const reference.
+  static const torrent::Object m_emptyObject;
 };
 
 }
diff --git a/src/utils/variable_generic.cc b/src/utils/variable_generic.cc
index 8ea2478c..91c1b325 100644
--- a/src/utils/variable_generic.cc
+++ b/src/utils/variable_generic.cc
@@ -163,4 +163,58 @@ VariableObject::set(const torrent::Object& arg) {
   }
 }
 
+// 
+// New and prettified.
+//
+
+const torrent::Object&
+VariableValueSlot::get() {
+  m_cache = m_slotGet() / m_unit;
+
+  return m_cache;
+}
+
+void
+VariableValueSlot::set(const torrent::Object& arg) {
+  value_type value;
+
+  switch (arg.type()) {
+  case torrent::Object::TYPE_STRING:
+    string_to_value_unit(arg.as_string().c_str(), &value, m_base, m_unit);
+
+    // Check if we hit the end of the input.
+
+    m_slotSet(value);
+    break;
+
+  case torrent::Object::TYPE_VALUE:
+    m_slotSet(arg.as_value());
+    break;
+
+  default:
+    throw torrent::input_error("Not a value");
+  }
+}
+
+const torrent::Object&
+VariableStringSlot::get() {
+  m_cache = m_slotGet();
+
+  return m_cache;
+}
+
+void
+VariableStringSlot::set(const torrent::Object& arg) {
+  switch (arg.type()) {
+  case torrent::Object::TYPE_STRING:
+    m_slotSet(arg.as_string());
+    break;
+  case torrent::Object::TYPE_NONE:
+    m_slotSet(std::string());
+    break;
+  default:
+    throw torrent::input_error("Not a string.");
+  }
+}
+
 }
diff --git a/src/utils/variable_generic.h b/src/utils/variable_generic.h
index f5e164a4..40c66f43 100644
--- a/src/utils/variable_generic.h
+++ b/src/utils/variable_generic.h
@@ -111,111 +111,69 @@ private:
   Type                m_type;
 };
 
-template <typename Get = std::string, typename Set = const std::string&>
-class VariableSlotString : public Variable {
+//
+// New and pretty.
+//
+
+class VariableValueSlot : public Variable {
 public:
-  typedef rak::function0<Get>       SlotGet;
-  typedef rak::function1<void, Set> SlotSet;
+  typedef rak::function0<value_type>        slot_get_type;
+  typedef rak::function1<void, value_type>  slot_set_type;
+  typedef std::pair<value_type, value_type> range_type;
 
-  VariableSlotString(typename SlotGet::base_type* slotGet, typename SlotSet::base_type* slotSet) {
-    m_slotGet.set(slotGet);
-    m_slotSet.set(slotSet);
+  template <typename SlotGet, typename SlotSet>
+  VariableValueSlot(SlotGet* slotGet, SlotSet* slotSet, unsigned int base = 0, unsigned int unit = 1,
+		    range_type range = range_type(std::numeric_limits<value_type>::min(), std::numeric_limits<value_type>::max())) :
+    m_base(base),
+    m_unit(unit),
+    m_range(range) {
+
+    m_slotGet.set(rak::convert_fn<value_type>(slotGet));
+    m_slotSet.set(rak::convert_fn<void, value_type>(slotSet));
   }
 
-  virtual ~VariableSlotString() {}
-
-  virtual const torrent::Object& get() {
-    m_cache = m_slotGet();
-
-    if (!m_cache.is_string())
-      throw torrent::internal_error("VariableSlotString::get() got wrong type.");
-
-    return m_cache;
-  }
-
-  virtual void set(const torrent::Object& arg) {
-    switch (arg.type()) {
-    case torrent::Object::TYPE_STRING:
-      m_slotSet(arg.as_string());
-      break;
-    case torrent::Object::TYPE_NONE:
-      m_slotSet("");
-      break;
-    default:
-      throw torrent::internal_error("VariableSlotString::set(...) got wrong type.");
-    }    
-  }
+  virtual const torrent::Object& get();
+  virtual void                   set(const torrent::Object& arg);
 
 private:
-  SlotGet             m_slotGet;
-  SlotSet             m_slotSet;
+  slot_get_type       m_slotGet;
+  slot_set_type       m_slotSet;
+
+  unsigned int        m_base;
+  unsigned int        m_unit;
+  range_type          m_range;
 
   // Store the cache here to avoid unnessesary copying and such. This
   // should not result in any unresonable memory usage since few
   // strings will be very large.
-  torrent::Object    m_cache;
+  torrent::Object     m_cache;
 };
 
-template <typename Get, typename Set>
-class VariableSlotValue : public Variable {
+class VariableStringSlot : public Variable {
 public:
-  typedef rak::function0<Get>         SlotGet;
-  typedef rak::function1<void, Set>   SlotSet;
-  typedef std::pair<int64_t, int64_t> Range;
+  typedef rak::function0<string_type>              slot_get_type;
+  typedef rak::function1<void, const string_type&> slot_set_type;
 
-  VariableSlotValue(typename SlotGet::base_type* slotGet,
-		    typename SlotSet::base_type* slotSet,
-		    const char* pattern,
-		    Range range = Range(std::numeric_limits<int64_t>::min(),
-					std::numeric_limits<int64_t>::max())) {
-    m_slotGet.set(slotGet);
-    m_slotSet.set(slotSet);
-    m_pattern = pattern;
-    m_range = range;
+  template <typename SlotGet, typename SlotSet>
+  VariableStringSlot(SlotGet* slotGet, SlotSet* slotSet) {
+    m_slotGet.set(rak::convert_fn<string_type>(slotGet));
+    m_slotSet.set(rak::convert_fn<void, const string_type&>(slotSet));
   }
 
-  virtual ~VariableSlotValue() {}
-
-  virtual const torrent::Object& get() {
-    m_cache = m_slotGet();
-
-    // Need this?
-    if (!m_cache.is_value())
-      throw torrent::internal_error("VariableSlotValue::get() got wrong type.");
-
-    return m_cache;
-  }
-
-  virtual void set(const torrent::Object& arg) {
-    if (arg.is_string()) {
-      Set v;
-
-      if (std::sscanf(arg.as_string().c_str(), m_pattern, &v) != 1)
-	throw torrent::input_error("Not a value.");
-      
-      m_slotSet(v);
-
-    } else if (arg.is_value()) {
-      m_slotSet(arg.as_value());
-
-    } else {
-      throw torrent::input_error("Not a value");
-    }
-  }
+  virtual const torrent::Object& get();
+  virtual void                   set(const torrent::Object& arg);
 
 private:
-  SlotGet             m_slotGet;
-  SlotSet             m_slotSet;
-
-  const char*         m_pattern;
-  Range               m_range;
+  slot_get_type       m_slotGet;
+  slot_set_type       m_slotSet;
 
   // Store the cache here to avoid unnessesary copying and such. This
   // should not result in any unresonable memory usage since few
   // strings will be very large.
-  torrent::Object    m_cache;
+  torrent::Object     m_cache;
 };
 
+
 }
 
 #endif