upgrade problems

[J. W. Ballantine]

I'm still trying to upgrade gnome2, and I'm getting:
  Stale depednency: gnome2-fifth-toe-2.4.2 -> gimp-gnome-2.0-pre3_1,1 
   (graphics/gimp-devel)

When I try to rebuild gimp-devel, I get
 /use/local/liblibxml2.0.so: undefined reference to 'pthread_equal'
 /use/local/liblibxml2.0.so: undefined reference to 'pthread_once'

So I did a deinstall ; distclean; install in textproc/libxml2
and got the same result.

Any thoughts on what I need to rebuild???

Thanks

Jim