can't login more than once

[Glenn Holmer]

This just started happening: I log in, and the progress bar freezes
before showing the desktop. The journal shows a core dump for
kactivitymanage. I can delete ~/.kde/ and I'm able to login again...
once. When I log out and then back in, it freezes again.

How do I get out of this?

-- 
Glenn Holmer (Linux registered user #16682)
"After the vintage season came the aftermath -- and Cenbe."