Over the past few months, I've been having more and more problems with iChat. Here are two that have been bothering me the most. 1. iChat stops making sounds. Whenever I send or receive a message, no sound is played. It does work for video-chatting though 2. I cannot send or receive files. When sending a friend a document, it says "Sent 0 bytes of x KB." Half of the time when receiving files, it immediately says "Unexpectedly ended." Is there anything I can do to fix this? Thanks.