Dear, you should change the breaks/replaces of kde4.10.2 in order to break kdelibs4c2a << 4:3.5.10.dfsg.1-6~ so that a version >> -6~ won't conflict with the current kde. Please see the solution here: https://bugs.launchpad.net/ubuntu/+source/kde4libs/+bug/1100622 Thank you, Roberto Guerra