BuddyPress 1.9.2 is available. This is a security and maintenance release, fixing two possible security issues with Group creation (responsibly disclosed by Pietro Oliva) along with some fixes to our WordPress Menus integration, bp-default theme switching, and improvements to theme compatibility.
A complete list of closed tickets can be found at the 1.9.2 milestone, and a full changelog is at http://codex.buddypress.org/developer/releases/version-1-9-2/.
This is a recommended update for all installations of BuddyPress 1.5+.
Upgrade via your WordPress Dashboard > Updates. You can also download the latest version at http://wordpress.org/plugins/buddypress.