No, the only modifications I've ever done to the system are custom icons and stuff like that, but I don't go for skinning and themes like some do since they generally look tacky and almost always cause problems. I am almost certain it is a 10.3.2 problem because this has never happened until last night. I am sorry I can't provide much detail on what I do before it happens because it seems to be a random occurrence. I'll be chatting with someone like normal and then my buddy will type something and as soon as it pops up, the whole chat window turns a blank white and I have to close it and wait for my buddy to IM something else so I can continue the conversation and see what is being said.