Am getting this in Dapper 6.06 - Bug #49810 seems to be exactly the same for me too.
I am running Gnome and had about 11 updates - the ones I could see in the box were all KDE ones (I have Konqueror and Scribus installed). Probably very similar to the updates Andre had in Bug #49810 I updated my apt lists using Synaptic. Then before updating my system I ran update-manager from CLI to see if I could get any interesting debugging info. Now I have 75 updates and update manager seems to be stable, no crashing. The KDE updates are hidden somewhere in the middle. I closed it and reopened it from the toolbar - same thing, no crash. I scrolled past the KDE updates to no effect either. -- update-manager resets xsession https://launchpad.net/bugs/49785 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs