GNOME Bugzilla – Bug 159012
Menu doesn't clear the area after it disappears
Last modified: 2004-12-22 21:47:04 UTC
build XFCE 4.1.91 or XFCE 4.1.99.1 or emacs 21.3.50 CVS version, right click on XFCE desktop or click the menu on emacs menubar then move your mouse and click to other area, the menu will not clear the area it occupied when it popuped. downgrade to gtk+2.4.13, both xfce and emacs run well. My X is Xorg 6.8.1
I can confirm this on Ubuntu Hoary with GTK+ 2.5.5 and 2.5.6 and XFCE 4.2 RC1 and RC2. Xorg version also 6.8.1 with NVIDIA driver 1.0-6629. Kernel version 2.6.9.
Emacs bugs, take it up with them. GTK+ apps are not allowed to assume that windows will be cleared to their background color on expose if they turn off double-buffering. (GTK+-2.6 expands the cases where no clearing occurs, but there have been cases where the background wasn't cleared since 2.0)