I've had the same error (C00D002F) on 3 videos now. I uploaded two of them myself but when I download them and try to sync them I get the error saying the files are "invalid or corrupt"
One of the videos which don't sync:
http://www.zuneboards.com/tv/view/48...ve-your-number
Also, on several videos the software still converts the videos. I don't mind this much though since the conversion is usually very short.