Same problem!!! Would love a solution.
Having the same problem here!
In my 1080 sequence on 2014.1 I was able to get 1/2 playing properly (but laggy). Updated to 2014.2 and now I can only play in full res (which my computer cant handle).
It even shows up this way in Souce Settings.
A fellow editor updated his Redcine-x and got his working but it didn't work for me.
Mac pro 4.1
2.66 ghz quad core
gt 120 512mb - I'm assuming this is the culprit, a gtx 680 is on the way. I will update when it gets here.
Update: I got an GTX 680 for mac and it seems to have fixed the problem in the program and source monitor, but the project/media browser thumbnails and source settings are still giving me the same issue.
I am having the same problem. Has anyone found a fix for this?
Any luck in fixing the problem. I am having the same issue - red footage shot with anamorphic lens. Plays back fine, but thumbnails are all glitched??