Fatal Error After Creating New Blog

After creating a new blog... when you try to choose anything in the drop down menu (Dashboard, Comments, etc)

it is giving a fatal error:
Fatal error: Cannot redeclare __popular_posts() (previously declared in /home/blogsmo/public_html/wp-content/themes/twentyten/functions.php:680) in /home/blogsmo/public_html/wp-content/themes/twentyten/functions.php on line 899

This seemed to start happening after adding a moderation plug in. First I added the one from this site and it didn't work - then I removed that and added another one I found for moderation for WPMU. The blog in seems to be working fine as far as having to approve the new blog. But nothing can be done as a use with that new blog.