upgrade 4.1.2 to 4.2.2 (passing vars problem with 4.2.2)

Hi, I have been running 4.1.2 for a while with no problems. This morning, I downloaded 4.2.2, did a configure/make/make install. All seemed to have gone well. However, it broke all my sites that use PHP. Here is a description of how it appeared to be broken. This is just an example, as I dont really own fakename.com. User goes to http://www.fakename.com/index.php User clicks on "help" and gets the main index page instead of the help page. The URL for help is.. http://www.fakename.com/index.php?target=help It is like PHP gets passed variables and "forgets" them immediately. What do I need to do? I reinstalled 4.1.2 and things are working again. Naturally, I would like to safely upgrade to 4.2.2. Thanks in advance for any help out there. I am at a loss for ideas on solving this myself. Kris