I noticed a few visual glitches popping up in this latest snapshot. One of these being that rain goes through (multiple layers of) blocks now. This is a rather inconsistent glitch too, as it will pass through some layers of blocks but won't pass through another seperate set of these.

So far, it seems to pass through all blocks in the game. Then again, as you can see in the screenshot below, it seems there are parts of the world where the rain does still act normal.