I have been using Lifestream for a while, and found it worked really well. However on updating to the latest version (or the ones just prior to it) with the upgrade to WP2.9), it's barely working.
It's not displaying any thumbnails in the Lifestream, the dates are all messed up, and additional Lifestream pages are created each time a Lifestream change is saved.
I've reported the errors in the 2 prescribed places (as listed on the product site), but after an initial response there has not been any responses to my requests for status updates.
Maybe the author is busy fixing things, but I don't see any evidence of that, although I'm still in hope that that is the case, because I'd like to see it working again. I'll keep on hoping that it will!