Is there anyone out there that knows why Vista and the Shoutcast encoder plugin for dj'ing with winamp just do not seem to get along? The moment I turn Shoutcast on, my CPU usage goes through the roof. With Vista, Shoutcast will not save all the settings and one has to remember to change them each time.
Have you tried running shoutcast as Administrator? (Right-click and "Run as Administrator").
Another thing to try is running it in Windows XP compatability mode. (Right-click the application, properties, Compatibility tab)