After installing these the last week, and doing the proper integration, I've noticed couple of odd things.

From Availability, going online to Facebook gives error message "incorrect password", even though it has worked before. When I toggle offline and back to online, Facebook gives no error and signs in normally. So it's not a case of wrong password.

Also I still see empty window when I go to Messages. I can only see my conversations when I select Show -> SMS and MMS and then back to Show -> All messages.