Every time I finish playing a video file in MMA I get an error message that states 'Unsupported format'. MMA plays the video successfully so I assume the error is caused by trying to update the play count. I am currently using build 189 but this also occurred in every build for at least the last two months.
If I stop a video part way through then the bookmark position and last played time will be updated in MMW on the next sync, but if I play from start to finish then it acts like the file has not been played.
I have submitted debug log A8BTB5L08L.
