error with python & gconf.so (gtk-2.0)

[Steve Franks]

I just got a clean portupgrade -a, so I hope my problem is not a
version issue, because I don't have any newer versions to install.  I
get the following when I try to run meld:

Thanks,
Steve

[steve at dystant /usr/home/steve]$ meld
Traceback (most recent call last):
  File "/usr/local/bin/meld", line 93, in <module>
    import meldapp
  File "/usr/local/lib/meld/meldapp.py", line 28, in <module>
    import prefs
  File "/usr/local/lib/meld/prefs.py", line 52, in <module>
    import gconf
ImportError: /usr/local/lib/python2.5/site-packages/gtk-2.0/gconf.so:
Undefined symbol "g_assertion_message_expr"
[steve at dystant /usr/home/steve]$