I'm just a user, not a contributer, but I've read -hackers long enough
to remember the many discussions over the years about bug trackers, and
the consensus always seemed to come back to "if it doesn't fit our
mailing-list-based workflow, it's going to fail."
I happened upon mention of a new bug tracker written by someone working
on Xen, where the requirements seem to be pretty similar, and thought it
worth bringing to you all's attention.
I make no representations about how mature the code is, how robust it
is, etc., but it seems like it might at least be a starting point for
something that could serve the PostgreSQL community in the way desires.
http://www.hellion.org.uk/blog/posts/emesinae-yet-another-bug-tracker/
Mike.