From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6)
Gecko/20040206 Firefox/0.8

Description of problem:
The following warning appears at the bottom of every page when logged in.

This is the default PHP settings and a couple of extra squirrelmail
modules loaded (spamassassin and others)

Warning: Unknown(): Your script possibly relies on a session
side-effect which existed until PHP 4.2.3. Please be advised that the
session extension does not consider global variables as a source of
data, unless register_globals is enabled. You can disable this
functionality and this warning by setting session.bug_compat_42 or
session.bug_compat_warn to off, respectively. in Unknown on line 0

Version-Release number of selected component (if applicable):
squirrelmail-1.2.11-1

How reproducible:
Always

Steps to Reproduce:
Enable certain extra modules in squirrelmail.  I am unsure which one
produces this message since the warning message refers to the file:
unknown rather than an actual filename.
    

Actual Results:  The warning message in the description appears at the
bottom of each page.

Expected Results:  The warning message shouldn't appear at all.

Additional info:

Turning register_globals to on is not an option.