[venember]

I installed and started XBMC on opensuse and got some error messages:

p11-kit: invalid config filename, will be ignored in the future: /etc/pkcs11/modules/gnome-keyring-module
/usr/lib64/xbmc/xbmc.bin: relocation error: /usr/lib64/libavformat.so.55: symbol av_reallocp, version LIBAVUTIL_52 not defined in file libavutil.so.52 with link time reference

Then the program quits.

Any idea?

[wsnipex]

yes, tell the opensuse maintainers that their package is broken. Likely due to them using external ffmpeg/libav.
This is not supported by us.
If you can, compile xbmc yourself.