I finally narrowed down the reason for the segmentation violation on my machine:
Whenever the PndDchDetector is enabled, I get aforementioned error, regardless of any other settings I have tried.
When I comment out the lines which include the PndDchDetector, the script runs fine without errors.
@Stefano: I have now set my Geant4 options as you have suggested, however in my gconfig/g4Config.C as I got it from SVN the "particular" options were already set that way.