[squid-users] TCP_MISS_ABORTED after upgrade to 3.2 form 3.1

We are having an issue with a web based employment application form
after upgrading our reverse proxy from 3.1.20 to 3.2.6. The proxy logs
the following:

1358969527.735 300778 75.91.238.15 TCP_MISS/400 459 POST https://...

Some do go through but very slowly, any ideas what would cause this?

The form is a simple form on a Plone server with Apache 2.2.23 in
between handling the HTTPS on the back end server.

-- 
Thanks,
    Dean E. Weimer
    http://www.dweimer.net/