Version: (using Devel) OS: Linux Installed from: Compiled sources I'm using KDE SC 4.4 beta 2 from the Kubuntu PPA. I noticed that for example closing the Kickoff menu or waiting for system tray notifications to slide back in leave artefacts on the screen when the "Sliding popups" desktop effect is used. If desktop effects are not used or I disable Sliding popups, no artefacts stay on the screen. My configuration is such that I have the panel on top of screen. I'm using a Lenovo Thinkpad T61 with a nVidia Corporation Quadro NVS 140M graphics adapter w/ proprietary drivers, if that changes anything. I'll try to post a couple of screenshots of the problem.
Created attachment 39356 [details] Kickoff menu leaving artefacts This is a part of a screenshot that shows how the Kickoff menu leaves artefacts when Sliding popups desktop effect is used.
Created attachment 39357 [details] System tray notifications leaving artefacts This is a part of a screenshot that shows how the system tray notifications leave artefacts when Sliding popups desktop effect is used.
Oh, I forgot to include that the artefacts disappear at least when something is drawn over them (like the mouse cursor or some other window), or when the complete screen is redrawn (for example when I switch to another virtual desktop).
Reported at bug 215400 Thanks *** This bug has been marked as a duplicate of bug 215400 ***