hmm, very strange.
you on a pc or a mac?
does it do this for all audio (mp3s and such too in winamp?_, or only video audio?
is it spastic or consistant (does it seem to warble or it is always 2x as fast, etc etc).
reminds me of back in the day when you could adjust the clock of your computer b/c some programs (games usually) would play too fast on them otherwise. lol- imagine that today?