Version: (using KDE Devel) Installed from: Compiled sources Compiler: gcc 4.1.3 OS: Linux When using the Dropdown list in the Configure Desktop dialog it can happen that the Panel is partly redrawn in a faulty way so that a part of the Panel is cleared and the wallpaper is visible. This is reproduceable here. Use the Dropdown list in such a way that it overlaps the Panel. Then move the dialog window up and click on the Dropdown list again. The part that was overlaped before(!) the dialog was moved is then cleared. This bug does not appear when you move the dialog sideways in the second step so that the Dropdown list overlaps the Panel again but at another position. In case this information is needed I am NOT using kwin with composite. Keep up the good work :)
what video driver are you using?
so the original reporter (talked with him on irc =) is using the radeon drivers, i'm using nvidia .. and both of us can confirm this bug. however, it's not a plasma bug: it's true of any app that is using an argb visual. i'm not sure what is to blame here (x.org, x.org drivers, qt, kwin? (i doubt the latter)) but this happens when any app that uses an argb visual shows a popup over another app. the other app can be using an argb visual or not, the problem remains. will have to investigate further with people more knowledgeable of x.org internals, i think.
*** Bug 155168 has been marked as a duplicate of this bug. ***
yes, this is a x.org / x.org driver related bug. the near future is going to suck as we're the first mainstream user app outside of window managers to seriously use this stuff. =/
*** Bug 155506 has been marked as a duplicate of this bug. ***