Hi all,
I just upgraded to 4.9.4 from 12.2 with KDE 4.8 (do not ask why......)
yesterday, just after the upgrade everything worked fine - today I booted up my computer and most applications (e.g. firefox, thunderbird, unison, cairo-dock) do not start...

starting from terminal I get:

/usr/lib64/thunderbird/thunderbird-bin: symbol lookup error: /usr/lib64/libpangocairo-1.0.so.0: undefined symbol: g_object_replace_qdata
in case of thunderbird - any solutions?