GNUBackgammon crashing

When I try to run gnubackgammon, I get the following error;

(gnubg:8101): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated

(gnubg:8101): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated

(gnubg:8101): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated

(gnubg:8101): Gtk-CRITICAL **: IA__gtk_main_quit: assertion `main_loops != NULL' failed

***WARNING***

Note that gnubg does not use the gnubg.bd file.
You should obtain the file gnubg_ts0.bd or generate
it yourself using the program 'makebearoff'.
You can generate the file with the command:
makebearoff -t 6x6 -f gnubg_ts0.bd
You can also generate other bearoff databases; see
README for more details

Traceback (most recent call last):
  File "/usr/lib64/python2.7/site.py", line 62, in <module>
    import os
  File "/usr/lib64/python2.7/os.py", line 398, in <module>
    import UserDict
  File "/usr/lib64/python2.7/UserDict.py", line 83, in <module>
    import _abcoll
  File "/usr/lib64/python2.7/_abcoll.py", line 11, in <module>
    from abc import ABCMeta, abstractmethod
  File "/usr/lib64/python2.7/abc.py", line 8, in <module>
    from _weakrefset import WeakSet
  File "/usr/lib64/python2.7/_weakrefset.py", line 5, in <module>
    from _weakref import ref
ImportError: No module named _weakref

Any ideas?
opensuse 11.4 64-bit, KDE 4.6.5