open kickoff launcher rigth click some entry in "favorites" tab, select "edit application..." click "application" tab edit "name" and/or "description" fields, click on "Ok" button Result: name/description of edited entry remains the same. The entry in "favorites" tab is updated when Plasma session is restarted. Sometimes the entry of the same app is updated immediately in "Applications" tab of the kickoff launcher (Firefox, for examaple), sometimes it's not updated even after restart Plasma (Quod libet player, for example).
Likely same root cause as Bug 393401
*** This bug has been marked as a duplicate of bug 393401 ***