Videos have a pink hint in Firefox

[Mikhail T.]

Hello! This is a bizarre new problem I noticed after a recent upgrade of 
Firefox -- not sure, when exactly it happened, because I don't view 
videos on my computer very often. Below is an example of what I'm 
talking about -- a screenshot from YouTube. But the problem is the same 
on other sites too.

I checked mplayer -- playing videos with it works fine. Not sure, if 
this is Firefox or some video-processing library that it relies on... 
Advice? Thanks! Yours,

    -mi