I've had this bug for a while now: Single blocks, usually pistons, just being vanished after I log in. But just now a large chunk of one of my buildings just up and disappeared into thin air, leaving behind only what I think might be the original dirt ground. And now I don't want to log in again in fear of other buildings being gone.
But that's just one of virtually hundreds of bugs: Redstone circuits stopping or overloading, water showing up somewhere, and the game lagging near deposits of lava to the point of breaking down. It's really getting out of hand, and the game is now unplayable for me unless those problems are fixed.
Thanks in advancement,

Sascha Böhmann