[Zope] any known bugs wrt transactions never being committed?

[Randall F. Kern]

In particular, I'm running Zope 2.3.1 and PostgreSQL 7.1b4, (tried both
PoPy and ZPsycopg).

The (very annoying!) problem I'm having is the postgres backend is
blocking on a transaction that should have already been committed (but
wasn't).

It seems that a transaction from an earlier request is not being aborted
or committed, but rather just left hanging.  There are no hung requests,
i.e. every page we request we get back in the browser.

Any ideas?  Thanks!
-Randy