If you know anything about Facebook for Android than you may know that they really haven't update since Version 1 very much, the build number of this update is only 1.3 and Android has been out for a year and a half. So that's not a lot.
The beauty of this situation is that Erick Tseng (Former Google Head Of Mobile) now works at Facebook as a Mobile guy, this update could be in direct conjunction with him joining the big Social Giant a few months ago. It could also have something to do with the fact that the CEO Mark Zuckerberg is now using a Nexus One rather than his iPhone to update Facebook news. So he could have wanted something a bit more polished when he updates, either way its a welcome update and most are hoping for more soon, chat is a BIG one that I hear about.
The update earlier in the week tackled the way everything looks, some other issues, how performed, how video worked, it seems like a big over haul and we are glad it FINALLY came, the update of Today is one that takes care of a battery draining issue. It seems like Facebook on Android has this problem, I know for one that the Evo 4G had a similar issue where the battery drained because of Facebook, however, it was a bit more difficult to fix. No worries though everyone, this one fixed it, or so it seems, report if back in the comments if you are having any issues still.