With kghostview installed and no longer requiring gs, I removed gs from my system. I don't use pdf/ps all that often anyway. Today I notice a reproducible segfault trying to view pdf files. I filed a bug with bt to bugs.kde.org.
Now I went lurking through the source for kghostview, and it most definitely has routines to call gs by name. Makes me think maybe kghostview cannot provide postscript-viewer, but instead should rely on gs or another viewer? Hope I'm wrong, like all the options debian gives, but I like to keep the number of packages installed to a minimum. Gordon Sadler