index.php in root directories not parsing after PHP5 upgrade

[yowzer]

I tried searching, but I didn't quite find this specific problem described anywhere. I used one of the PHP5 walk-throughs for upgrading PHP to version 5 in Plesk 7.5.x. It works perfectly except for one thing.

Instead of index.php in the root directory, it is being sent as plain text with content-type application/x-httpd-php. It's a very strange thing because PHP is working fine in most places.

In a sample directory tree, all of these work fine:
/blort.php
/pics/
/pics/index.php

The strangest thing is that while http://www.mydomain.com/ returns the PHP file as text, http://mydomain.com/ compiles the PHP and sends the HTML properly.

I am on Plesk 7.5.3 and PHP 5.1.4.

 

[yowzer]

This is the guide I used:
http://forums.serverbeach.com/showthread.php?t=6125

Even more strange in this whole situation is that when I was going to start some more troubleshooting, everything was working fine. While I hate not knowing what the issue was (I suspect Apache was caching), it's at least resolved now.

I still need to upgrade some PEAR packages for Horde to work, but it looks like things went fine.