In reply to Mathieu: It usually takes days, not hours, before I notice the problem, but I think I have never gone more than three days without. I have run an instance of valgrind --leak-check=full --trace- children=yes --log-file=nm-applet-%p.log nm-applet in a console and hit Ctrl-C when I noticed the problem. I'm attaching a bzip2 compressed log file.
The console output was --snip ** Message: applet now removed from the notification area (nm-applet:10742): GdkPixbuf-CRITICAL **: gdk_pixbuf_composite: assertion `dest_y >= 0 && dest_y + dest_height <= dest->height' failed ** Message: No keyring secrets found for WLAN-001A4F3AD299/802-11-wireless-security; asking user. ^C** Message: PID 0 (we are 10742) sent signal 2, shutting down... --snap (Note: The "No keyring secrets" message is related to a different problem.) ** Attachment added: "Log generated by valgrind --leak-check=full --trace-children=yes --log-file=nm-applet-%p.log nm-applet" https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1011073/+attachment/3251319/+files/nm-applet-10742.log.bz2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1011073 Title: NetworkManager submenus sometimes unpopulated To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1011073/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs