THE DOOR IS OPEN!!!
The DOOR is OPEN on JK's site!!!!!
Go via the hairband portkey to the room with the door and click on the handle. The door opens and you'll see a BLACK SPACE...
If you want to solve the puzzle yourself.... got for it. :~) Or if you're impatient like me, check out TLC. You'll find the key in the comments.
Talk about excting!!!! :~D :~D :~D