I have encountered weird issue and maybe its cause (edited: probably not ). I have 3 layers and all was OK...accidentaly I placed backdrop with alpha channel to the top-most layer that has also scrolling set to 0 in order to let all the stuff (HUD) in the same place.
And what happened - some active objects looks like different objects, some are resized and cut off..there are also weird glitches.
PS: I forgot to add that when I was moving with the player, change in direction caused sprite change! I was player and suddenly I became another object. For reproducing, I dont know..but Im not the only one, one player reported the same problem.