WordPress MU

I've read the below links on upgrading WPMU. However, after upgrading, all my pages are "blank." The main page, the /wp-login.php, the /wp-admin/upgrade.php, and so on. There are no error messages or such.

http://codex.wordpress.org/Upgrading_WPMU
http://codex.wordpress.org/Upgrading_WordPress
http://codex.wordpress.org/Upgrading_WordPress_Extended

Basically, I backup my data, tar v1.3.3 and overwrites v1.2.1 and copy back the wp-config.php / index.php / and the wp-content directory. Switching back from my backup yields normal displays.

I've searched the forum and I don't see a similar issue. Thanks in advance.

Regards,

Mike

Take all of the original files under mu-plugin and delete them. They got moved. The white blank pages are errors that are suppressed.

Removed the "mu-plugins" from the wp-content directory solved the problem, thanks.