BuddyPress.org

Your first port of call should really have been the themes home having established it is a theme issue or so it would appear.

If you read through this page you arrive at:
http://freebpthemes.com/themes/buddymatic/?replytocom=409#respond

Which appears to be a similar or the same issue? and it might be worth adding to this comment stream? There is also a possible solution that might be tested.