I've recently upgraded to fiesty from edgy, and I'm experiencing the same problem (on initial upgrade I wasn't experiencing this problem - about 3/4 days ago).
I've tried the method of renaming gnome-session with a .real extension, and having a shell script running the following command as gnome-session in /usr/bin: #!/bin/bash G_SLICE=always-malloc G_DEBUG=gc-friendly valgrind -v --tool=memcheck --leak-check=full --num-callers=40 --log-file=valgrind.log /usr/bin/gnome-session.real $* I also found that running like this did not produce the crash. So I logged out and renamed the files back (leaving gnome-session and gnome- session.valgrind), then logged back in again via gdm. I'm getting the crash again! I'll try changing it back and logging in and out a few times, to see if I can reproduce it. In the meantime, here's the valgrind.log produced. ** Attachment added: "valgrind.log" http://librarian.launchpad.net/7098559/valgrind.log.12743 -- gnome-session: malloc() memory corruption https://launchpad.net/bugs/93613 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs