Firefox blacks out on fullscreen

I just noticed this as I don't use fullscreen firefox almost ever, so i can't say when it began.
There are actually three different "usecases" that i compared doing the same with extra/chromium:
- activate fullscreen (pressing F11) on whatever page, right click on whatever point -> all screen flashes black, except for the right click menu area [chromium too, but a bit faster]
- deactivate fullscreen from a previously fullscreened page -> all screen flashes black, no except and longer than first case [chromium too, but a bit faster]
- activate fullscreen, middleclick -> all screen flashes black, no except and longer than first case [chromium doesn't show this problem]
I'm using extra/kde and extra/nvidia...
Note about third case: i changed the middleclick configs in firefox as said in http://wiki.archlinux.org/index.php/Fir … ick_errors and that could be the reason why firefox does it and chromium doesn't (i didn't change anything there)
I apologize if a thread already existed but i couldn't find anything
EDIT: forgot to mention that the thingy for fast scrolling and relative problem appear only if the page is long enough to be scrolled. Don't pick Google Search as test for that, but something like Slashdot or so...
Last edited by lucak3 (2010-09-29 15:51:58)

I fear it's KWin effects fault: deactivating compositing(*) makes firefox behave perfectly on those cases...
I'll try to see which effects are at fault
*: to make it fast, click Meta+F12 (Meta is usually Alt+Shift) or type this in a bash shell "qdbus org.kde.kwin /KWin org.kde.KWin.toggleCompositing" (without double quotes ofc)

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