No need to handle BC/RtC power on the client now is there...

tile/powersink/AERootPoweredTile.java

@@ -88,6 +88,9 @@ public abstract class AERootPoweredTile extends AEBaseInvTile implements IAEPowe
 	@Override
 	final public double injectAEPower(double amt, Actionable mode)
 	{
+		if ( amt < 0.000001 )
+			return 0;
+
 		if ( mode == Actionable.SIMULATE )
 		{
 			double fakeBattery = internalCurrentPower + amt;

tile/powersink/BuildCraft.java

@@ -9,6 +9,7 @@ import appeng.api.config.PowerUnits;
 import appeng.core.AppEng;
 import appeng.tile.events.AETileEventHandler;
 import appeng.tile.events.TileEventType;
+import appeng.util.Platform;
 import buildcraft.api.power.IPowerReceptor;
 import buildcraft.api.power.PowerHandler;
 import buildcraft.api.power.PowerHandler.PowerReceiver;
@@ -54,6 +55,8 @@ public abstract class BuildCraft extends AERootPoweredTile implements IPowerRece
 	BCPerdition bcPowerWrapper;
 
 	public BuildCraft() {
+		if ( Platform.isServer() )
+		{
 			try
 			{
 				if ( Loader.isModLoaded( "BuildCraftAPI|power" ) )
@@ -68,6 +71,7 @@ public abstract class BuildCraft extends AERootPoweredTile implements IPowerRece
 				// ignore.. no bc?
 			}
 		}
+	}
 
 	@Override
 	@Method(modid = "BuildCraftAPI|power")

tile/powersink/RotaryCraft.java

@@ -35,6 +35,7 @@ public abstract class RotaryCraft extends IC2 implements ShaftPowerReceiver
 	};
 
 	public RotaryCraft() {
+		if ( Platform.isServer() )
 			addNewHandler( new RotaryCraftHandler() );
 	}