php_gd2.dll not found

I am thoroughly confused. I have just upgraded my dev environment to Apache 2 (where it was), php 5.1.2 (PHP 5.1.2 zip <http://www.php.net/get/php-5.1.2-Win32.zip/from/a/mirror> package), MySQL 5.0.20a, under Windows XP. Anomaly 1: I carefully navigated the MySQL mess, got the required DLLs into my /ext folder, noted where extensions are found in php.ini, uncommented the lines to load mysql and php_gd2. MySQL drivers load fine, so I am uncommented correctly and have correctly designated the folder where extensions are to be found. I continue to get a message that php_gd2 is not found. PHP Startup: Unable to load dynamic library 'c:\php\ext\php_gd2.dll' - The specified procedure could not be found. Anomaly 2: When I do a "phpinfo();" to see what is actually loaded, among the info is the notice that I am using php 5.0.3-dev. What might I be doing wrong? Is there a patch for php_gd2.dll that I have missed? Have I somehow downloaded the wrong php version, or could something simply have gotten corrupted? Thanks, Ari