I stopped to go to the chat entirely for a while because of this. Ten minutes of freezed blue screen, then 20 notices that a script might cause the computer to work slowly, then nothing.
I think it works better when you update the Adobe reader and flashplayer and whatnot constantly, and don't have 10 other tabs and windows open. That's what I did, and yesterday it worked pretty well. That is, until 60 people were in the room, then it crashed for me a few times, as well.