Pistons are buggy in 1.2.11

I can't have the video, but bassicly pistons when using observers red stone pulse when put together and blocks with gravity, them pointing up, creates a weird glitch where anymore than 1 piece will break. Also when two pistons are together, see image 1 and a wall, they push it through the wall and then it still stands, but in general, pistons glitch when using gravity blocks, and observers freeze so often. I hope this is fixed, because not that I will use it, but that it is very weird nonetheless.