Microsoft Band and Band 2 owners will want to head to the Store to grab the latest update to the Microsoft Health app. Version 2.3.20408 is out bumping up from the earlier 2.3.20329 (it's version 1.3.x for 8.1 users).
No new features are likely included with this update or at least that we can spot right away. Instead, this is likely a bug fixing update to go along with the new social features, custom notifications and more introduced over the last few weeks.
There is always hope too that the Band keyboard will work better with current Windows Phone, but we'll have to wait and see. For what it is worth, ours stills says 'connecting' for infinity, so maybe not.
Grab the latest update and shout out in comments if you notice anything else fixed or improved.