Since updating to the latest version I'm seeing this screen redraw glitch that seems to only exist on the video display area of the program window. As soon as any element overlaps the display area the display freezes and the overlapping pixels are frozen in place. If I flip to the desktop and come back, for example, I see a chunk of desktop there and nothing I do can bring back the video. Every new overlapping element will newly freeze into the display area, but the video will never show again.
If I reboot I can get back to a clean start, but the behavior still comes back. Trashing the preferences works the same and prevents a reboot, but the behavior still comes back. HOWEVER, if I turn off my full screen display to the second monitor, EVERYTHING IS FINE and no problem exists - as long as I start the program this way. Turning off the second display in Preferences>Playback won't fix it once it's happened.
I tried fooling with preferences, toggling open CL, and messing with everything I could. But nothing works except killing the second monitor display. I'm almost certain this started when I installed 2014 recently. I have changed my video card in the last month, but I'm pretty sure I installed 2014 after that, and that was when the problems began.
If anyone has advice, I'm all ears. I am out of ideas and ready to call this a bug. Thanks.
Win7 pro, i7, 24GB
Radeon R9 270
LG/AOC displays via DVI