according to "apt-cache policy" you don't have a dapper-updates source at the moment which is creating your issue since you install libglib2.0-0 from a dapper-updates source previously, that's not a bug, closing it. Activating a dapper-updates apt source will fix your issue
** Changed in: glib2.0 (Ubuntu) Status: Needs Info => Rejected -- Wrong package version https://launchpad.net/bugs/53673 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs