You'd be better served checking other threads and/or checking the main page for a more comprehensive list, however since I'm writing I may as well also put something productive in:
I don't remember specifically what was in in 31.08 however...
Hospitals work fairly well now though some things are still bugged (crutches don't work, unless they were just fixed in the last update, haven't tested them since then, sometimes it can be hard to assign stuff to a hospital in terms of supplies and you cannot limit what kind of supplies are used in an easy way so you can end up with a dwarf being sutured with adamantine strands).
Military works well, some people still complain about it but I've found it to be very easy to use (sure the menu can be a bit overwhelming but everything is explained very well within and for additional info there is of course the wiki and forum). I have had high success with them equipping what I want them to in a reasonable time and they are much easier to use to attack/defend then the old military (IMO).
In the newest version metals have been seriously reduced in numbers, there are many new farm animals added (and you now have to feed large grazing animals lest they starve), there are a few new industries (eggs/wool/beekeeping/etc).
Overall, while there are still bugs here and there, there are no (that I've noticed at least) major gamebreaking bugs, or honestly even really irritating bugs (the worst being the lack of functional crutches which leads to a lot of perma-crippled dwarves after accidents).
-MB