When watching video in fullscreen in Safari the image gets really messed up as soon as the HUD disappears. I don't remember how long it's been going on but atleast the few latest big upgrades. Bugs the heck out of me. What to do? This only happens in Safari, in i.e Chrome video in fullscreen looks just fine. Running AdBlock as the only plugin but disabling it doesn't make a diffrence. Running a Macbook Air 13", early 2014 with the latest of everything installed and updated (El Capitan).