Built with libXScrnSaver present it links against libXss.so.1 (NEEDED entry revealed by objdump -p using LDFLAGS -Wl,--as-needed) and breaks when 'emerge --depclean' is executed since there is no depend. file '/usr/kde/4.0/lib64/libkdeinit4_krunner.so'
Fixed in kde-base/krunner-4.0.1-r1, thanks :)