I just installed the new build by odie (thanks): r24761 for windows. This thread will contain any bugs I find in this version.
#1: Actor movement out of sync error, sending the player back to geoscape still exists in r24761.
I encountered it after a soldier moved on a tile he normally shouldn't be able to walk on (rocky slope in scout_crash map).
#2: In the Aircraft menu (in a base), Soldier Tab: The scrollable list does not work correctly. To be specific, if you scroll down the list (more than 8 soldiers in base required), exit the Aircraft menu, enter the Aircraft menu again (and select soldier tab), then the state of the list is inconsistent. The logic part still believes it is scrolled down (saved from last time you were here), but the GUI part displays it as not scrolled down, i.e. starting at soldier #1.
So if you click on soldier #1, it will in fact select soldier #[amount you scrolled down previously]+1.
It can be fixed by scrolling down and up again, then the selection works normally again.
#3: The moon can be seen in front of the earth (despite being behind it actually) in geoscape 3d view if you're zoomed in a lot.
To reproduce, zoom out, look for the moon, position your view so that the moon is positioned behind the earth, then zoom in as far as possible. At some point, the moon will appear.
#4: Game shut down with message "unknown action type" in the log when I clicked the "start aircraft" button (Base->Aircraft menu) of my Firebird-class dropship.
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I will post more in this thread if I encounter any more bugs in r24761.
edit: added #3
edit2: added #4