media player help

So i went to espnradio to listen to the live stream today and noticed that it would no longer play on my 3 month old 1.67ghz powerbook g4. So i tried copying the url from the page source and no dice. so i also went to another site and tried to watch some streaming video, there was no sound but the video was fine. and i tried a flash site (homestarrunner) and no sound. But all he quicktime content works fine. (all these apps work on my mini)
any ideas?

(sorry this is a repost from the other apps forum but i neeed some help)

Closing thread dule to rule 2. Please see the thread below for responses.

http://www.mac-forums.com/forums/showthread.php?p=183073#post183073