Yeah, when I have the following mods:
IC2, modloader, modloadermp, forge 3.1.2.97, not enough items, zombe's pack (with compatability patch) and optifine
All of my IC2 config file info gets put under general, with items and blocks totally blank. Seems to work fine, I just noticed because I have to update the config file for my group to use on my server, and this is making it a pain in the ass since I can't just tell Notepad++ to 'Compare' and show me the differences 