Just a couple to report at thre moment:
Breaching charge firing the wrong way(!)
I was playing beach party and had one trooper set a charge to blow open the kitchen door. I then had another trooper actually detonate the charge. Instead of blowing into the room, it fired outwards and killed my trooper! I've only seen this happen once, so no idea what conditions might have caused it. Inept troopers possibly.
Getting stuck in doors
I just managed this one a second time while trying to replicate the breaching charge problem. I fitted a camera to a door, then moved a trooper right up to it. I think it requires turning the trooper a couple of times, but it's possible for the trooper to get stuck on top of the door and be unable to move or turn. The sprite appears on top of the door, but the trooper is still the same side - he won't get shot by anyone inside the room.
You can still carry out actions on the door, and opening it unsticks the trooper.