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;
@@ -54,18 +55,21 @@ public abstract class BuildCraft extends AERootPoweredTile implements IPowerRece
 	BCPerdition bcPowerWrapper;
 
 	public BuildCraft() {
-		try
+		if ( Platform.isServer() )
 		{
-			if ( Loader.isModLoaded( "BuildCraftAPI|power" ) )
+			try
 			{
-				if ( AppEng.instance.isIntegrationEnabled( "" ) )
+				if ( Loader.isModLoaded( "BuildCraftAPI|power" ) )
-					addNewHandler( bcPowerWrapper = new BCPerdition( this ) );
+				{
-				bcPowerWrapper.bcPowerHandler.configure( 1, 380, 1.0f / 5.0f, 1000 );
+					if ( AppEng.instance.isIntegrationEnabled( "" ) )
+						addNewHandler( bcPowerWrapper = new BCPerdition( this ) );
+					bcPowerWrapper.bcPowerHandler.configure( 1, 380, 1.0f / 5.0f, 1000 );
+				}
+			}
+			catch (Throwable t)
+			{
+				// ignore.. no bc?
 			}
-		}
-		catch (Throwable t)
-		{
-			// ignore.. no bc?
 		}
 	}
 

tile/powersink/RotaryCraft.java

@@ -35,7 +35,8 @@ public abstract class RotaryCraft extends IC2 implements ShaftPowerReceiver
 	};
 
 	public RotaryCraft() {
-		addNewHandler( new RotaryCraftHandler() );
+		if ( Platform.isServer() )
+			addNewHandler( new RotaryCraftHandler() );
 	}
 
 	@Override