I was accidently invited into a guild today. I notified the guild leader and asked politely if I could be removed since I couldn't afford the membership at the moment. When I was removed, my friend list glitched out and started flashing wildly. It also didn't remove the guild tag from my name. I had to log to correct it.

Just thought I'd give you a heads up that it glitches when you're removed/leave a guild in two ways.