Hi,
Not sure about this one. A forums search turned up these threads:
http://forums.winamp.com/showthread.php?threadid=256175
http://forums.winamp.com/showthread.php?threadid=254181
http://forums.winamp.com/showthread.php?threadid=250028
http://forums.winamp.com/showthread.php?threadid=242436
http://forums.winamp.com/showthread.php?threadid=180770
The replies suggest to me that this is a broadcast issue, and that there isn't much you as a listener can do.
(note that some of the threads above take the perspective of the broadcaster, so it gets a little technical here and there)