Affects Version/s: Minecraft 14w28b
Fix Version/s: None
I was playing on a superflat desert, and playing with command blocks, I summoned a creeper with a large explosion radius, switched to survival, and after it blew up, most blocks that I place nearby/in the explosion are invisible.
Even torches and redstone are invisible, but you can still see particles.
/summon Creeper ~ ~ ~