If you get this again, no need to reboot. Just click the K-menu; "Run Command"; type "kbuildsycoca" (without the quotes) in the box; click "Run".
Restarting KDE also suffices (log out, then log in again). (It'd be nice if the package manager did this for you though) ** Changed in: koffice (Ubuntu) Status: Unconfirmed => Rejected -- Latest KOffice 1.5.2 won't start https://launchpad.net/bugs/53019 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs