monotone crashing

hi there,

when trying to run monotone (without any options or so) i get the following
error:

terminate called after throwing an instance of
'__gnu_cxx::__concurrence_lock_error'
  what():  __gnu_cxx::__concurrence_lock_error
Abort trap: 6 (core dumped)

i'm running r191768 and monotone-0.43 from the ports dir.

cheers.