Created attachment 69896 [details]
Backtrace for kactivitymanagerd when crashed.
I'm using kubuntu 11.10, with KDE 4.8.1. I frequently met kactivitymanagerd crashed when I logged in. It crashed with signal 11 (segmentation fault). Not always, but quite often.
I attached a crash backtrace.
*** This bug has been marked as a duplicate of bug 290234 ***