WordPress versions 2.7 and higher have an automatic upgrade option built in. The plugin interferes with the native upgrade routine and vice versa, so neither of them will work.

If you’ve got a WordPress version older than 2.7, by all means use WPAU to upgrade it, but once you’ve arrived at 2.7 or higher you’ll need to deactivate and delete the WPAU plugin.

Always keep your WordPress installation and plugins up to date. Updates typically include security enhancements. Mixing old & new versions of WP and your plugins also doesn’t always work well.

This article copyright © John Nasta 2009 – All Rights Reserved

Related posts:

1. WordPress Security – Protection Against Hackers There are a bunch of things you can do at no cost that will make...
2. WordPress.com vs. WordPress.org Finally, a post about Wordpress for people who have never used it. Are you "wp-curious"?...
3. Changing The URL Of Your WordPress Site WordPress web site owners often come to realize that they want to change the URL...