2.95 fixes a bug that causes every version older than 2.95 to crash when run for the first time or after logging in and pulling a new profile to the device due to a bug in the ad network's plugin.
2.94 enhances the way screen updates and nearby-guy refreshes are handled, and (temporarily) disables push notifications on Honeycomb tablets by default due to bug that causes popup error notifications if network connectivity is lost.
2.93 adds new prefs setting to let you increase the number of thumbnail icons per row to any value between 4 and 10. Handy for tablets! (2011-11-04)
2.92 makes logins a little friendlier, esp. if you forget your username/password (2011-10-31)
2.91 adds the ability to indicate that you're visiting (new checkbox on 'location' screen, new icon overlaid over thumbnail when checked) (2011-10-22)
2.90 adds support for Honeycomb tablets (Xoom, Transformer, A500, Galaxy Tab, Thrive, etc) and improves image-loading (improved quality and reduced latency) (2011-10-11)
If you're upgrading from a version older than 2.88, PLEASE (re-)set your username and password from the 'Profile' tab before upgrading... especially if you aren't 100% sure you remember your username or password.
Upgrading? Please read this first