I was going to build a church in multiplayer Creative, and when I tried to place stained glass, it worked, but it dissapeared after a second. This also affects all of the new flowers except for the Poppy. The only new blocks that are placeable are the Dark Oak and Acacia blocks(including planks,slabs,etc).
This also applies for SMP. Anyone else having this problem?
EDIT 11/10/13: Made a mistake in the bug report. Only the plank blocks work, not the slab and stair variants etc. Dunno about the log variants. Sorry XD