I run a SMP server with SimpleServer wrapper and ic2. I was having problems being disconnected when crafting certain items. I let the simple server people know and they said it was because of an enchanting feature and they just need the data values for any enchant-able items so the can add them.
The link to the forum topic is below.
http://www.minecraftforum.net/…d__12000148#entry12000148