It will play mp4's flawlessly, but when I try playing an .mkv file, it will allow me the first 5 seconds or so in perfect quality, but if I tap the screen the controls don't come up. And 5 seconds after playing, it crashes back to the homescreen. Anyone else have these problems? I don't have my other tweaks installed, just: Activator Adblocker Airblue Sharing AppList BigBoss Icon Set Cydia Installer Cydia Translations Erica Utilities Evasion 6.0-6.1.2 Untether f.lux FullScreen for iPad iFile iSeries Shows iTransmission 3 Mobile Substrate Safari Download Manager Springtomize 2 Substrate Safe Mode SwipeAway All of these tweaks are in their latest versions, and no cracked apps at all. What gives?