Just got this a few days ago and It's been great so far but I've tried to put some video files on it to watch on the train etc. but I'm having issues with stuttering video when playing .MKV files. I'm using MoBo player to play them as it's supposed to handle subtitles well (Couple of Anime episodes in there). Anyone know of a way to fix this? Or can maybe reccomend a better app to use? Don't know whether it matters but I'm trying to watch directly from the SD card (PNY Professional, 16GB, SDHC, Class 10, 20MBs).