I upgraded the Apache Webserver, and all of the PHP, libraries, and stuff on the WildAndBad server to their 64-bit versions. While there I upgraded the versions to the latest.
This means that errors, lack of service and such happened...and may still happen. I'm on it but just in case you have a problem and can't wait email me at firstname.lastname@example.org and let me know what youfound and a link to the error (or a screenshot of it).
I'd say it has been an interesting change to go from PHP 5.1 to 5.3...lots of differences. More than I'd expected.