Realms bug - doors break and can't be replaced

^{Update by [Mojang] Mega_Spud (Jay Wells):}
Verification Builds:
1.2.2.3 (Realms)
1.2.5.0 Retail Beta Build 1

Summary:
Doors that do not have two solid blocks beneath them will break when they receive a block update. (For example, trying to place a pressure plate beside them.) Once the door has broken, no other door can be placed there until there are two solid blocks beneath.

Steps to Reproduce: (Method 1)

1. Place two blocks on top of each other
2. Place a door on the top block
3. Break the lower block
4. Place a block next to the door

Observed Results:
The door will break and drop as an item.

Expected Results:
The door should not break unless it's supporting block is broken.

Steps to Reproduce: (Method 2)

1. Attempt to place a door on a single floating block.

Observed Results:
The door will appear to place for a split second, but not leave the inventory.

Expected Results:
The door should be able to be placed on a single floating block.

Screenshots/Videos attached: Yes

Notes:

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Original Description:
When walking over a wooden pressure plate in Realms instead of opening the door it breaks it. It does not happen in Single Player.