Confirmed here - using any version other than 14w29b removes the glitch entirely. Happens with/without VBO (unrelated to the bug.)
After breaking a block, a multi-second delay occurs before the drop appears. During this delay, the block appears to remain in place and can be damaged (all the way to breaking) again.
Tool durability seems to be consumed if you continue breaking the ghost block. - unverified however
Placing blocks also results in a multi-second delay before they appear. During this delay, the block's hitbox is visible, but not the block itself.
Confirmed here - using any version other than 14w29b removes the glitch entirely. Happens with/without VBO (unrelated to the bug.)
After breaking a block, a multi-second delay occurs before the drop appears. During this delay, the block appears to remain in place and can be damaged (all the way to breaking) again.
Tool durability seems to be consumed if you continue breaking the ghost block. - unverified however
Placing blocks also results in a multi-second delay before they appear. During this delay, the block's hitbox is visible, but not the block itself.