First of all
Important: You should not post any bugs about the latest stable release.
Given that this is "Bugs in latest stable version", seems like an odd thing to have in the sticky for this section.
1) Living quarters are bugged in the battlescape, stairs are impassable
2) If your base is attacked while the dropship is away you can still use those soldiers on the dropship to defend it
3) On some maps the left side entrance to one of the UFO's is mysteriously blocked/impassable. (UFO_Tropical I believe)
4) One of those yellow blind kangaroo things (Sheevar?) can be found in the containment battlescape, even if you haven't encountered them yet (believe I heard discussion about this, not a bug?)
5) Aliens tend to see through walls and attempt to shoot you through them (doesn't work).
6) AlexSullencity played in a base defense map in the middle of a sunny day, even though the song is ambient with a thunderstorm.