Bukkit

• Allowed non destructive interactions to be performed when in another player's protected area, e.g. read a book, eat food, place a boat.
• Option to allow players to operate switches, buttons and pressure plates in the -admin- protected area.

When a BlockPlaceEvent is cancelled (i.e. player attempts to place a second bed), the 2 block of the bed still appears to be placed. I believe this is a bug in Bukkit/Minecraft. See this issue in the github page and this forum post for more details.