Try to playback this sample http://www.fileplanet.com/131326/130000/fileinfo/Max-Payne-2-Official-Trailer-
First time it's playback without problems, but close SMPlayer, open it again, and try to playback this sample second time - you not get video at all, only sound (until I remove .config/smplayer/file_settings).
This bug related to any mov and ogv. Maybe some others file formats - I not try all of them.
Tested on SMPlayer 0.6.9 (SVN r3447) on Ubuntu Mavercik with fresh mplayer rc4.