BuddyPress.org

To recap:

PREVIOUS ENVIRONMENT:

BlueHost hosting, WordPress MU + BuddyPress 1.2.2.1 installed via SimpleScripts and automatic upgrades. Also had WordPress in a root directory.

PROBLEM:

After upgrading to BuddyPress 1.2.3, clicking the tabs for Activity, Members, Groups, Blogs, About generated an Internal Server Error.

SOLUTION:

Removed the WordPress installation from the root web directory.

Deleted the directory containing the WordPress MU + BuddyPress.

Deleted the previous databases.

Create a database and database user.

Manually install WordPress MU (WPMU)

Manually install BuddyPress.

TIPS:

If you have questions along the way, start with the links provided by the WPMU installation page (on your website) and search the WordPress MU and BuddyPress support forums. I also recommend the free ebook, Installing WordPress MU For Beginners, by Andrea Rennick, available at http://wpmututorials.com/wp-content/plugins/download-monitor/download.php?id=1

Use cPanel > MySQL Databases to create the database, create the user with ALL privileges, and assign the user to the database. Avoid using the “MySQL Database Wizard” tool. I got connection errors when I used the wizard.

I have an open request to my web hosting provider, BlueHost, to enable wildcard subdomains for my domain. (I elected to have new blogs appear as subdomains.) You can avoid this hassle if you opt to create user blogs as subdirectories.