Validation error for EVERYTHING now

I just installed the latest 6.2 and everything was working great until I created a block that had some php code in it.

Here's what happened:
1. I enabled the PHP filter
2. I created a custom block for the right side
3. I put some php code in that runs some OpenX ads (see below)
4. I saved the block (PHP filter option was checked) - the code worked fine.
5. I went back to make a change to the same block and could not save it - validation error
6. I tried to edit an existing post and make a new post - validation error
7. I tried to delete my custom block with PHP - validation error
8. I tried removing the PHP filter option from the main modules - validation error
9. I tried changing the PHP code in the block to nothing - validation error
10. I disabled my ad campaign in OpenX, now when I edit a post I get a validation error AND the following error:

"user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') ORDER BY fit DESC LIMIT 0, 1' at line 1 query: SELECT * FROM menu_router WHERE path IN () ORDER BY fit DESC LIMIT 0, 1 in /home/mydir/public_html/includes/menu.inc on line 315."

Basically the only think I can do now is login. No new posts or editing can be done.

Here is the PHP code that broke everything:

<?php
 /* <!-- OpenX XML-RPC Tag v2.4.5 -->
  *
  * As the PHP script below tries to set cookies, it must be called
  * before any output is sent to the user's browser. Once the script
  * has finished running, the HTML code needed to display the ad is
  * stored in the $adArray array (so that multiple ads can be obtained
  * by using mulitple tags). Once all ads have been obtained, and all
  * cookies set, then you can send output to the user's browser, and
  * print out the contents of $adArray where appropriate.
  *
  * Example code for printing from $adArray is at the end of the tag -
  * you will need to remove this before using the tag in production.
  * Remember to ensure that the PEAR::XML-RPC package is installed
  * and available to this script, and to copy over the
  * lib/xmlrpc/php/openads-xmlrpc.inc.php library file. You may need to
  * alter the 'include_path' value immediately below.
  */

    //ini_set('include_path', '.:/usr/local/lib');
    require 'openads-xmlrpc.inc.php';

    if (!isset($OA_context)) $OA_context = array();

    $oaXmlRpc = new OA_XmlRpc('mydomain.com', '/openx/www/delivery/axmlrpc.php', 0, false, 15);
    $adArray = $oaXmlRpc->view('', 0, '', '', 0, $OA_context);

    echo $adArray['html'];
?>

Any ideas?

-Sean