I've moved a Moodle install from one machine to an identical machine and now it won't run. It gives no error on the screen, logs no error anywhere I can find, it just returns a completely blank page. The server is running PHP without issues and I've verified this with a simple helloworld-style PHP program that just print phpInfo();
When I say the two servers are identical I really do mean it. They are on identical hardlware bought at the same time and have the identical OS (RHEL5) with the identical packages, patches and upgrades installed.
I'm completely at sea on this one since there isn't even an error message to check for! In desperation I disabled SELinux but that didn't help either.
Has anyone ever seen anything like this, or does anyone have any suggestions I could try?