No desktop apps start in KDE

I’ve got something peculiar. Fresh install OpenSuSE 11 off the DVD, on a system with an nVidia card. End user or root, I can start things like yast & firefox, but Dolphin and Konqueror just don’t start. I created a new user to create fresh settings, but that doesn’t appear to have worked.

Anyone any ideas?

starting konqueror (as user) from a console gives no errors either ?