However, it just happened again. This time I noticed an update- notification picture and the bomb icon at the same time. Furthermore, when I then chose the "Report a bug..." option, I got another crash report saying that Firefox Web Browser closed unexpectedly (although I had not already been running firefox, _and_ after that, me not doing anything in the meantime, Firefox came up anyway on the xfdesktop-bug- report page.
** Attachment added: "xfdesktop crash log" http://librarian.launchpad.net/5025797/_usr_bin_xfdesktop.1000.crash -- "xfdesktop" supposedly crashed https://launchpad.net/bugs/69264 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs