it appears that the kompare libraries do not have their soversion set correctly on git master.

install output:

drwxr-xr-x root/root         0 2015-03-02 12:26 ./usr/lib/x86_64-linux-gnu/
-rw-r--r-- root/root     10168 2015-03-02 12:26 ./usr/lib/x86_64-linux-gnu/libkompareinterface.so.SOVERSION
drwxr-xr-x root/root         0 2015-03-02 12:26 ./usr/lib/x86_64-linux-gnu/qt5/
drwxr-xr-x root/root         0 2015-03-02 12:26 ./usr/lib/x86_64-linux-gnu/qt5/plugins/
-rw-r--r-- root/root     68400 2015-03-02 12:26 ./usr/lib/x86_64-linux-gnu/qt5/plugins/komparenavtreepart.so
-rw-r--r-- root/root    222368 2015-03-02 12:26 ./usr/lib/x86_64-linux-gnu/qt5/plugins/komparepart.so
-rw-r--r-- root/root     80960 2015-03-02 12:26 ./usr/lib/x86_64-linux-gnu/libkomparedialogpages.so.SOVERSION
drwxr-xr-x root/root         0 2015-03-02 12:26 ./usr/bin/
-rwxr-xr-x root/root    102952 2015-03-02 12:26 ./usr/bin/kompare
drwxr-xr-x root/root         0 2015-03-02 12:26 ./usr/include/
drwxr-xr-x root/root         0 2015-03-02 12:26 ./usr/include/kompare/
-rw-r--r-- root/root      4096 2015-03-02 12:22 ./usr/include/kompare/kompareinterface.h
lrwxrwxrwx root/root         0 2015-03-02 12:26 ./usr/lib/x86_64-linux-gnu/libkomparedialogpages.so -> libkomparedialogpages.so.SOVERSION
lrwxrwxrwx root/root         0 2015-03-02 12:26 ./usr/lib/x86_64-linux-gnu/libkompareinterface.so -> libkompareinterface.so.SOVERSION

Reproducible: Always