I just upgraded my Power Mac G5 from Panther to Tiger and iChat (3.0, v388) will no longer play sounds when events (like Message Received) occur. In iChat Preferences, I have tried all combinations of Play sound, Bounce icon, and Speak text. Bounce icon works, Speak text works, but Play sound does not. I have tried other events; they have the same problem. When I change sounds in the "Play sound" drop-down, I hear it play. But when the event actually occurs, I don't. My Sound panel in System Preferences is set normally, my sound is not muted, and I can hear iTunes playing just fine. I trashed my iChat preferences and started over. Same problem. iChat Help didn't offer a solution. I don't see another thread about this in the forums. Any ideas?