That doesn't really make sense, I still have to craft things that use iron ingot on a crafting table, like a iron shovel, etc. Also, I wouldn't expect the behavior to be a crash and Nullpointerexception in any case.
Am I using the right version of IC2 and forge for Minecraft 1.6.2? Is IC2 maybe incompatible with Ferrullo's gun mod?
Thanks!
-Shawn