This was an incompatibility between kubuntu-firefox-installer and the ruby bindings in kde 4.4. I've backported the version from 10.04 that contained the same fix. It should appear as an update for PPA users within the hour.
** Changed in: kubuntu-firefox-installer (Ubuntu) Status: New => Fix Released -- kubuntu-firefox-installer crashes on launch https://bugs.launchpad.net/bugs/526673 You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kubuntu-firefox-installer in ubuntu. -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs