[@simplescripts Member 14 years, 9 months ago]

The trouble was a line in the .htaccess file that was not edited properly. For anyone else having this trouble (it has been fixed on the SimpleScripts end) the line that needs to be changed is:

RewriteBase /wordpress-mu/

to

RewriteBase /your-installation-directory/

(replacing with your directory)

OR

RewriteBase /

(if your installation is in the root of your domain eg. http://www.yourdomain.com instead of http://www.yourdomain.com/buddypress)