problem importing languages in CVS tip

Are we supposed to report bugs with the CVS tip of PostgreSQL, or are
we to assume that the developers are well aware of problems there and
are already working on them?  After my most recent CVS update I find
that I cannot run createlang either to import the plpgsql nor the
plpython languages - both attempts give the error message:

ERROR:  index_cost_estimator: invalid amcostestimate regproc
createlang: external error

at the client and

ERROR:  index_cost_estimator: invalid amcostestimate regproc

on the server end.

Hmm.  Now it is giving me that error even when I attempt a simple
`psql -l' which makes me wonder if I have done something horribly
wrong.  Does anyone else see this?

-- 
Brandon Craig Rhodes                         http://www.rhodesmill.org/brandon
Georgia Tech                                            brandon@oit.gatech.edu