WordPress MU

After upgrading to 3.0, when I go to Super Admin --> Sites, the "Visit" link is going to the correct address, but the "Backend" link is only going to the "domain.com/wp-admin" instead of going to the backend of each blog, such as "blog1.domain.com/wp-admin". Is this a domain mapping issue, WPMU issue yet to be resolved or an .htaccess problem?

Any help would be great.

Are you using the domain mapping plugin?

Yes, I am using the domain mapping plugin. Sorry for opening two of these posts. You can just respond to this one to make life easier.

Known issue. :) get the latest trunk version.

http://plugins.trac.wordpress.org/browser/wordpress-mu-domain-mapping/trunk/domain_mapping.php?rev=235858

When I copy that into my mu-plugins folder after renaming the original domain_mapping.php to domain_mapping2.php, I get the following error:

Fatal error: Cannot redeclare dm_add_pages() (previously declared in /home/domain/public_html/wp-content/mu-plugins/domain_mapping.php:29) in /home/domain/public_html/wp-content/mu-plugins/domain_mapping2.php on line 36

Is there something special I need to do to install this php file?

You should delete domain_mapping2.php. The software reads all *.php files within the 2 plugin subdirectories.

Yeah, don't add a second copy. :) Replace.

Awesome. Thank you so much. Works perfectly.

Does this new version only work on the root directory as well? I just find it to be a pain (organization wise) to sit in the root directory.

Yes, it has to be in the root. The way domain mapping works in general makes it so it has to be there, wouldn't matter what DM plugin you try.