Ahem, I'll make this quick, My party buttons look very wierd after having to check steam data cache. It glitched, so I reset it, so the party button looks odd and red and black, and it makes me go insane. Here's 2 images I've taken of it.

Pressed button:
http://imgur.com/luOhV

Unpressed button:
http://imgur.com/Xh5Rx

That's it.