Facebook and RIM released an updated verison of this popular application. It goes from verison 1.6.0.17 to 1.6.0.21. You can update it thru Blackberry App World or from the app directly. In the app hit your menu button, then Options and scroll to the bottom to do an upgrade check.
Been running it since early this morning..haven't noticed any bugs/glitches/problems. Status updates are quicker. Refreshing no longer causes the phone to freeze or "hang". Better intergration with the Blackberry calender and Facebook events. So mostly just small stuff that was fixed/improved.
Download it. Always good to be up to date.