I'm using the version of X current for Debian Jessie. I find that windows are sometimes corrupted. The typical case is in XTerm, when the bottom line is covered by a copy of the second-last line. It happens a little more than half the time, so some sort of race condition.
It is not confined to XTerm; Emacs and Aisleriot show some of the same behavior. In all cases, moving the window will cure the problem. The redraw is correct. So my conclusion is it's a fault in X. I've never had to report an X bug before. If you will give me a list of info to provide, I will send it in a later message. Otherwise, thanks for your attention. Andrew _______________________________________________ xorg@lists.x.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: https://lists.x.org/mailman/listinfo/xorg Your subscription address: %(user_address)s