Avatar Image Path Wrong on Some Sites

This is a really weird problem.

On at least one site in our network (running Buddypress), the image path to avatars is wrong. On the other sites, it’s totally fine.

Here’s where it’s wrong:
http://fanspeak.com/nfldraft/

Here’s where it’s right:
http://fanspeak.com/baltimoreravens/

When it’s wrong, the path is not including /files before /avatars/..

Broken: http://fanspeak.com/avatars/3/stevenewheadshot1989d608bd60113fe50a68b6374dafb5b-avatar1.jpg
Working:
http://fanspeak.com/files/avatars/3/stevenewheadshot1989d608bd60113fe50a68b6374dafb5b-avatar1.jpg

It’s built in top of bp-default, so it’s calling <?php echo get_avatar( get_the_author_meta( 'user_email' ), '50' ); ?>

Any idea? .htaccess file is normal Multisite setup.