I managed to turn it off :D
When I'm opening ubuntuforums links in multiple tabs in firefox, some of the tabs are displaying with a pink background.
I also use Compiz! I don't know how to rectify the problem :(
IT happens to me to, it's probably a april fools joke
Check the forum. Oh, and your date ;).
It will go away after you change a couple of pages....There will be lots of threads on the subject.....in different languages too!!!