Well, I recently tried to play an .MKV file on my Media Gate. Specifically, an .MKV of Fairy Tail Episode 87 from Tsuki Fansubs.
Normally, this would work fine! I'd be enjoying an episode of Fairy Tail for about 23 1/2 minutes!
But today, Media Gate decided to hate me. Today, Media Gate decided to literally split the screen in half and put a long black bar in the middle. That 'Bar' contained another video from something else in my external HDD.
Henceforth, I now vow to buy my media players from Western Digital.
Media Gate met my trash can after that little mishap.