Redmine

OS = CentOS-5.3
Apache-2.2.3 (https)
Ruby-1.8.6
Rails-2.1.2
Mod_Rails-2.0.6
Redmine r2480 (v-8.0)

Here is the problem.

I recently upgraded to v-8.0 from 7.? on our main server. Everything works fine there. We have an identically configured, and I mean identical down to the hardware level, off-site server which is rsync'ed from the main server every six hours. This system worked fine before the update, but since the first rsync following the main system update we cannot get redmine to start on the off-site host. Instead we see the CentOS/Apache welcome page.

I have determined that the configuration of the off-site host httpd service, which is identical to the main host except for the IP addresses, works as expected. I have demonstrated this to my satisfaction by placing an index.html file in the redmine/public directory which is then rendered without error. However, Redmine itself evidently does not start. There are no messages in the httpd error logs. There are no messages in the system log. There are no SELinux exceptions logged either.

I have probably overlooked something obvious so I hope that another set of eyes can detect what I am failing to consider important.