Upgraded to OSx 10.10 for R12 - now weird problems with QT

So, not EXACTLY an R12 problem, but since I had to move to OSx 10.10 to run Resolve 12, I'm having weird quicktime player problems now. QT 7 opens all 1920x1080 QTs displaying as 382x257 - not 1920x1080 - even though the 'normal size' is 1920x1080. Re-installed 7.6.6, no change. QT 10 player doesn't work at all most of the time.

Anyone seen this? Know the solution?

Greg, I'm using QT 7.6.6 also and seeing no problem under OSX 10.10.3. This is with QuickTIme Pro on a 2013 nMP.

I wonder if you may have to patch the operating system and re-install 10.10.3 and see if this fixes the internal QuickTime engine.