In my installation they are in ~/.kde4/share/apps/plasma/comics (and the Plasmoid works correctly). Which bug report are you referring to? One in the SL Bugzilla or one in the KDE Bug Reporting System?
Hm... the comics are in both places on my sys. In /apps/plasma/comics and in /apps/comic, which seems to be the extracted archive. I deleted the later folder and reinstalled the comics and everythings fine now. No idea how that happened though, but probably my own doing as I'm pretty much fiddling around with anything at the moment. Thanks for the help.