The solution is twofold. One, you must use the mercurial version. Two, you must make this manual edit.
Line 3041 of core/libengine.py should read like this:
surf = pygame.transform.scale(surf,(int(size),int(size)))
Seems fine to me after those changes.
Game: Commander Stalin
One idea made me laugh:D
The plane just stuck on air. WOW.
fixed. comments were disabled for no particular reason.