diff --git a/container/AEBaseContainer.java b/container/AEBaseContainer.java
index 3cbfedf60..f93787977 100644
--- a/container/AEBaseContainer.java
+++ b/container/AEBaseContainer.java
@@ -647,6 +647,11 @@ public abstract class AEBaseContainer extends Container
 		}
 	}
 
+	public void updateFullProgressBar(int id, long value)
+	{
+		updateProgressBar( id, (int) value );
+	}
+
 	private void updateHeld(EntityPlayerMP p)
 	{
 		try
diff --git a/core/sync/AppEngPacket.java b/core/sync/AppEngPacket.java
index 3eea3a8cb..4c69c952c 100644
--- a/core/sync/AppEngPacket.java
+++ b/core/sync/AppEngPacket.java
@@ -30,6 +30,7 @@ public abstract class AppEngPacket
 
 	protected void configureWrite(ByteBuf data)
 	{
+		data.capacity( data.readableBytes() );
 		p = data;
 	}
 
diff --git a/core/sync/packets/PacketMEInventoryUpdate.java b/core/sync/packets/PacketMEInventoryUpdate.java
index 3f7d13979..afaafa6ad 100644
--- a/core/sync/packets/PacketMEInventoryUpdate.java
+++ b/core/sync/packets/PacketMEInventoryUpdate.java
@@ -4,9 +4,13 @@ import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.nio.BufferOverflowException;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.zip.GZIPInputStream;
+import java.util.zip.GZIPOutputStream;
 
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.GuiScreen;
@@ -14,6 +18,7 @@ import net.minecraft.entity.player.EntityPlayer;
 import appeng.api.storage.data.IAEItemStack;
 import appeng.client.gui.implementations.GuiMEMonitorable;
 import appeng.client.gui.implementations.GuiNetworkStatus;
+import appeng.core.AELog;
 import appeng.core.sync.AppEngPacket;
 import appeng.core.sync.network.INetworkInfo;
 import appeng.util.item.AEItemStack;
@@ -26,18 +31,52 @@ public class PacketMEInventoryUpdate extends AppEngPacket
 
 	// output...
 	final private ByteBuf data;
-	int lastSize = 0;
+	final private GZIPOutputStream compressFrame;
+
+	int writtenBytes = 0;
+
 	boolean empty = true;
 
 	// input.
 	final List<IAEItemStack> list;
 
 	// automatic.
-	public PacketMEInventoryUpdate(ByteBuf stream) throws IOException {
+	public PacketMEInventoryUpdate(final ByteBuf stream) throws IOException {
 		data = null;
+		compressFrame = null;
 		list = new LinkedList();
-		while (stream.readableBytes() > 0)
-			list.add( AEItemStack.loadItemStackFromPacket( stream ) );
+
+		int originalBytes = stream.readableBytes();
+
+		GZIPInputStream gzReader = new GZIPInputStream( new InputStream() {
+
+			@Override
+			public int read() throws IOException
+			{
+				if ( stream.readableBytes() <= 0 )
+					return -1;
+
+				return (int) stream.readByte() & 0xff;
+			}
+
+		} );
+
+		ByteBuf uncompesssed = Unpooled.buffer( stream.readableBytes() );
+		byte tmp[] = new byte[1024];
+		while (gzReader.available() != 0)
+		{
+			int bytes = gzReader.read( tmp );
+			if ( bytes > 0 )
+				uncompesssed.writeBytes( tmp, 0, bytes );
+		}
+		gzReader.close();
+
+		int uncompesssedBytes = uncompesssed.readableBytes();
+		// AELog.info( "Recv: " + originalBytes + " -> " + uncompesssedBytes );
+
+		while (uncompesssed.readableBytes() > 0)
+			list.add( AEItemStack.loadItemStackFromPacket( uncompesssed ) );
+
 		empty = list.isEmpty();
 	}
 
@@ -58,27 +97,53 @@ public class PacketMEInventoryUpdate extends AppEngPacket
 	@Override
 	public FMLProxyPacket getProxy()
 	{
-		data.capacity( lastSize );
-		configureWrite( data );
-		return super.getProxy();
+		try
+		{
+			compressFrame.close();
+
+			configureWrite( data );
+			return super.getProxy();
+		}
+		catch (IOException e)
+		{
+			AELog.error( e );
+		}
+		return null;
 	}
 
 	// api
 	public PacketMEInventoryUpdate() throws IOException {
+
 		data = Unpooled.buffer( 2048 );
-		list = null;
 		data.writeInt( getPacketID() );
-		lastSize = data.readableBytes();
+
+		compressFrame = new GZIPOutputStream( new OutputStream() {
+
+			@Override
+			public void write(int value) throws IOException
+			{
+				data.writeByte( value );
+			}
+
+		} );
+
+		list = null;
 	}
 
 	public void appendItem(IAEItemStack is) throws IOException, BufferOverflowException
 	{
-		is.writeToPacket( data );
-		empty = false;
-		if ( data.readableBytes() > 20000 )
+		ByteBuf tmp = Unpooled.buffer( 2048 );
+		is.writeToPacket( tmp );
+
+		compressFrame.flush();
+		if ( writtenBytes + tmp.readableBytes() > 30000 )
 			throw new BufferOverflowException();
 		else
-			lastSize = data.readableBytes();
+		{
+			writtenBytes += tmp.readableBytes();
+			compressFrame.write( tmp.array(), 0, tmp.readableBytes() );
+			empty = false;
+		}
 	}
 
 	public int getLength()
diff --git a/core/sync/packets/PacketProgressBar.java b/core/sync/packets/PacketProgressBar.java
index ab137b8b6..77dd72699 100644
--- a/core/sync/packets/PacketProgressBar.java
+++ b/core/sync/packets/PacketProgressBar.java
@@ -15,12 +15,12 @@ public class PacketProgressBar extends AppEngPacket
 {
 
 	short id;
-	int value;
+	long value;
 
 	// automatic.
 	public PacketProgressBar(ByteBuf stream) throws IOException {
 		id = stream.readShort();
-		value = stream.readInt();
+		value = stream.readLong();
 	}
 
 	@Override
@@ -28,7 +28,7 @@ public class PacketProgressBar extends AppEngPacket
 	{
 		Container c = player.openContainer;
 		if ( c instanceof AEBaseContainer )
-			c.updateProgressBar( id, value );
+			((AEBaseContainer) c).updateFullProgressBar( id, value );
 	}
 
 	@Override
@@ -36,11 +36,11 @@ public class PacketProgressBar extends AppEngPacket
 	{
 		Container c = player.openContainer;
 		if ( c instanceof AEBaseContainer )
-			c.updateProgressBar( id, value );
+			((AEBaseContainer) c).updateFullProgressBar( id, value );
 	}
 
 	// api
-	public PacketProgressBar(int short_id, int value) throws IOException {
+	public PacketProgressBar(int short_id, long value) throws IOException {
 
 		this.id = (short) short_id;
 		this.value = value;
@@ -49,7 +49,7 @@ public class PacketProgressBar extends AppEngPacket
 
 		data.writeInt( getPacketID() );
 		data.writeShort( short_id );
-		data.writeInt( value );
+		data.writeLong( value );
 
 		configureWrite( data );
 	}