It appears the fix for CAN-2004-1019 is bad (missing * before rval) and causes issues with squirrelmail. See https://bugzilla.fedora.us/show_bug.cgi?id=2444 for details. Affects all versions of RHEL 2.1 that ship php (= all I assume).
Created attachment 111854 [details] Correct fix for CAN-2004-1019 (from Fedora Legacy)
Thanks for the report, Leonard.
Why is this still pending? I think there must have been a couple of updates for php for 2.1 in the mean time...
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2005-838.html