When I look at my lifestream, the last facebook update repeats itself evey other item. Right now my lifestream looks like this:
(about 10 twitter updates)
facebook status update 1
twitter message 1
facebook status update 1
twitter message 2
facebook status update 1
twitter message 3
facebook status update 1
twitter message 4
facebook status update 1
twitter message 4
flick update
facebook status update 1
facebook status update 2
(some other items that are normal)
Last night the facebook message that was repeating was different, so it looks like it's just repeating the last facebook status message.
I'm using "Sort Lifestream by Time" and using FF3b5