these keep coming back, one seems to disable any form of keyboard input be it in chat, amounts in TO or placing deposits. It's somehow linked to Flash and a recurring bug where it auto-zooms in 1 level. Once it's done that, forget any text input until after refreshing the whole thing.
There's another one too where trying to click on somebody's name to mail or whisper seems to go through the process, but no mail or whisper window comes up. End up having to manually do it via the mail window which, if the previous bug is also in force, is impossible to do.