Security update 2008-002 breaks apache?

As a fairly novice OS X Server admin I'm a little stumped on this one. I've installed the 2008-002 security update onto 10.4.11 server yesterday and it appears to have broken my apache config pretty badly. I have quite a few URL's that people use on my server that they don't put the trailing / on (ie http://www.domain.com/here) and apache is not happy. It would appear on closer inspection that the performance cache port, 16080, has been substituted in the virtual host directives *everywhere* even though it's not enabled anywhere including the server admin tool. If I attempt to access the site without the trailing slash, I am redirected to http://www.domain.com:16080/here/ which obviously is not what i want. I've attempted to change the *:16080 entries in all the virtual host configs and this just breaks things even more. Has anyone seen any similar problems with the latest security update? Any assistance appreciated. Drew