I was experimenting with redstone when I came across a sound bug. The door does not open, however the "opening door" sound plays.
Please Note:

• I tried destroying and replacing both the button and the door
• I am on a Bukkit server using Minecraft 1.4.6
• Bukkit version: 1.4.6-R0.2

Sacha862 (in Minecraft)

Here is a short clip with the bug.