This one is just a small bugfix version, although it also does improve the look of desert sand edges so that deserts feel more desert-y. We're in progress on a number of things internally that weren't quite ready for this one, but which will be released later today, though.
More to come soon -- 1.0 is coming up next week (though we still don't have an exact day yet). Enjoy!
This is a standard update that you can download through the
in-game updater itself, if you already have 0.500 or later. When you
launch the game, you'll see the notice of the update having been found
if you're connected to the Internet at the time. If you don't have 0.500 or later, you can download that here.