With the recent Adobe Flash Player update(11.2) in Linux, there seems to be a major color glitch in flash videos for users using Nvidia graphic cards. When viewing flash videos, a user experiences the colors being reversed/altered like you’re watching a negative slide of a film. Imagine, watching a red Ferrari in stark blue & the skin tones of humans being transformed to that of folks from the movie Avatar. Yes, its really frustrating. Updating the Nvidia drivers to the latest won’t work.
To fix this colour glitch, unfortunately one needs to disable hardware acceleration for videos. To disable hardware acceleration, open up a youtube video, right click in the video area & select settings. In the first tab(Display) itself, you should get “Enable Hardware Acceleration” option with a checkmark in the radio box. Simply uncheck this & now try playing a video. If everything goes well, you should be able to view colours accurately.
Another option is to rollback to Adobe Flash 11.1, if you prefer not to disable hardware acceleration. I hope Adobe issues an update on this soon.