I wasn't sure whether to post this under Multimedia or Internet and Networking.

Hi,

I am encountering a weird problem with Youtube videos, the colors are negative. I am obviously sure that it's not a problem with the screen, I tried dailymotion.com and it works well, the colors are correct.
In Youtube everything is OK, the thumbnails are good, except when I start to watch the video, the colors are negative...

I haven't made any changes to my computer, neither my Youtube or Flash Player settings.
This just happened today.

Can anyone help me with this issue ?

Cordially.
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.
Thanks ShekvaL, your solution worked very well.