zeroconf traceback in python2.5/freebsd

[Giorgos Keramidas]

I just tried enabling the zeroconf extension on FreeBSD, running Hg
under Python 2.5 by adding to my ~/.hgrc file:

    [extensions]
    zeroconf =

and I got this traceback when "hg paths" run in an Hg workspace:

: keramida at kobe:/home/keramida$ hg paths
: Exception in thread Thread-2 (most likely raised during interpreter shutdown):
: Traceback (most recent call last):
:   File "/usr/local/lib/python2.5/threading.py", line 486, in __bootstrap_inner
:   File "/usr/local/lib/python2.5/site-packages/hgext/zeroconf/Zeroconf.py", line 934, in run
:   File "/usr/local/lib/python2.5/site-packages/hgext/zeroconf/Zeroconf.py", line 1295, in wait
:   File "/usr/local/lib/python2.5/threading.py", line 240, in wait
: <type 'exceptions.ValueError'>: list.remove(x): x not in list
: Unhandled exception in thread started by
: Error in sys.excepthook:
:
: Original exception was:
: keramida at kobe:/home/keramida$

Does this look like a known issue?  A bug in Hg?  Something broken in
the way I enabled zeroconf?