Version: (using KDE 4.2.1) OS: Linux Installed from: Debian testing/unstable Packages With desktop effects enabled, the Konqueror windows are often corrupted, especially directly after switching to a Konqueror window. To reproduce (almost) every time, bring up some web page (bugs.kde.org shouhttp://www.kde.org, switch away and back to the Konqueror window, and press DOWN or UP once to scroll. Then the top of the viewport is covered by a band of garbage. This is a Thinkpad T61 with kernel 2.6.28.1, Debian lenny/sid, xserver-xorg-video-intel 2.6.1-1.
Created attachment 32008 [details] screenshot with www.kde.org I should add that sometimes also parts of the window frame, menu bar and toolbars are corrupted.
If toolbars and menubar are also corrupted, this doesn't seem to be a KHTML drawing bug, so I'm reassigning this to KWin(window manager)
Driver.