i didn't say that that is the problem. i've only said that i'm using the opengloverlay set to on and the hwcursor to on and till now (3 hours and 47minutes i didn't have any sign of that annoying stuff). i've also been using firefox for the same time and still haven't had that issue. there's a great possibility that this is only some coincidence, but it still may be not. or it may be that i've just upgraded to firefox 18.104.22.168 from 22.214.171.124 (i've only had that issue after some right clicking in firefox not from other apps so it can also be some gtk+-kde or gtk+ bidings problem since firefox is a gtk+ app). i don't know yet if this is the solution. you can give it a try if you want and see what happens.If the OpenGLOverlay would be the problem that would be very odd, because it is only used for multimedia apps and I've not run any multimedia apps today so far.