undefined symbol

[Jacob Kanev <kanev@cs.tu-berlin.de>]

Hi, I'm using debian slink and get an error message when trying to use
kpaint, kdvi, ksysv, kgv, khelp and simular programs (otherwise kde
works fine, by the way):
    kdvi: error loading shared librarys
    /usr/X11R6/lib/libkfile.so.2: undefined symbol: __pure_virtual
Slink had been installed without any errors, and running ldd over
libkfile.so.2 just says everything's in place and ok.
What's going on here, and how can I fix it? I've been getting an
"undefined symbol" message in other situations as well. What does it
mean in general?

   ____________
   regards,
   jacob.
   <kanev@cs.tu-berlin.de>