Videos created in iMovie on the new ipad will not play on PC with Quicktime after being exported to the Camera Roll and copied to the PC. Movie will play but with a black screen only. Audio ok. Was able to do before ios 6 but not now.
I'm having the same problem. All of the movies I export out of iMovie since upgrading to the latest version show up with no video, only audio, in Quicktime. Ironically the video place just fine in Windows Media Player and also in iTunes.