It seems I'm getting a very strange error, I've included my fml-client-latest log below. Please keep in mind I'm using 1.7.10, forge version 1558. I'm aware I'm running a version under what it's recommended, but I can't identify the mod that's causing this issue. Any help would be greatly appreciated.
fml-client-latest can be found at http://pastebin.com/1Z3yjfC1