i rendered an mpeg-1 file last night in vegas. when i play it back in windows media player, i have a full screen of green blocks that last about a second. they break away and then everything is fine. when i bring the mpeg file into vegas, i can't see any trace of the garbage. anyone know what causes this? i've had similar problems with the cinepak codec, but instead of green, the first frame is blurry.

???

-craig