I exported a presentation from Keynote to a movie, but when I came to play it on a Windows XP computer with QuickTime 6.5 installed, I got an error -8992 message. There was sound, but no picture.
After messing around for a bit, turns out disabling Video Acceleration in the QuickTime settings solved the problem. Try disabling DirectShow first, then DirectDraw, then just turn off all the Video Acceleration options.