BuddyPress.org

Have you contacted your theme author? Looks like it needs to be updated for WP 3.3 and BP 1.5.2. To double-check whether it is indeed so, deactivate the rt-tachyon-wptheme and all RT plugins like the gantry-buddypress plugin and the rokbok css plugin, etc. Then change to bp-default theme and see if behavior is corrected.