It’s the most obvious and annoyingly distracting bug there could possibly be. Windows build is simply not rendering properly, it is not drawing any in-between steps and instead you have constant glitches and freezing. How could you not know?
I can’t believe anyone would even release that to public, it’s such an enormous drawback the game like that simply “doesn’t work”, it’s a complete no go. That’s not even being incomplete, it’s just totally wrong, like a car with square wheels.
Anyway, I fixed it more than a month ago, even explained what, where and how:
http://www.cataclysmdda.com/smf/index.php?topic=415.msg4309#msg4309
…and since then I keep asking why in the world is it not being fixed in the official build yet?