Maybe you just need to delete .kaffeine directory with the
configuration...
** Changed in: kaffeine (Ubuntu)
Status: Unconfirmed = Rejected
--
kaffeine don't start
https://bugs.launchpad.net/bugs/67486
You received this bug notification because you are a member of Kubuntu
Team, which is
I have an identical problem.
Seems it only affects one user at a time, so it can be resolved on my
system by deleting ~/.kde , but that's a ridiculous solution.
I can't quite work out how to reproduce the bug - it manifests after
some multiuser operation eg. adding new user, 2 users use X