So, I noticed IC2 started getting updates a little while ago, so I decided to update my 1.7.10 build to use it.
... Nope! It crashed the game. I read a thread about a crash similar to this and it said delete the config, so I tried deleting the config with no luck.
Here's the crash log.
I forget how to list the files in my mods folder, so if anyone could remind me, that'd be great.