mp2 403 intermittent problem

[Tad Johnston <suppressed>]

Since converting over to mp2 about a year ago, we seem to be having 
intermittent problems with ErrorDocument.

This is the current configuration in the apache.conf file.

<Location /blah>
    SetHandler          perl-script
    PerlResponseHandler Work::Blah
    PerlOptions         +ParseHeaders
    ErrorDocument       403            /login
</Location>

<Location /login>
    SetHandler          perl-script
    PerlResponseHandler Work::Access::Login
    PerlOptions         +ParseHeaders
    ErrorDocument       403             /login
</Location>

Scenario:
=======================================
I access /blah through a browser.  The mod_perl2 then looks for a 
browser cookie and if it can't find it or it has expired, it returns a 
403 error.  Returning a 403 will then access the /login through the browser.

Problem:
=======================================
Everyone got the login page in mp1 100% of the time and now it seems as 
only about 70% of the time users get the login page.  What they get 
instead is the following:

--------------------------------------------------------
Forbidden

You don't have permission to access /blah on this server.

Additionally, a 500 Internal Server Error error was encountered while
trying to use an ErrorDocument to handle the request.
Apache/2.0.53 (Linux/SUSE) Server at internal.blah.com Port 80
--------------------------------------------------------

After seeing this error, reloading the page between 1 and 5 times seem 
to fix this problem and you then get the /login page you should be 
receiving.

Anyone have any ideas or suggestions? I'd include more code, but it's 
pretty convoluted.

Thanks,
Tad