OK I got it. This seems to be due to the Xinerama (I mean TwinView...) config. I just turned the Twin View option off, and the ksplash icons look just fine...
-- Ksplash icons for dapper kubuntu theme are too close to each other https://launchpad.net/bugs/41407 -- kubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
