What I expected to happen was:
When I left click an item frame in Creative, the item frame should break immediately
What actually happened was:
When I left clicked it nothing happened. I held down the left click and birch plank particles came out (birch plank was the block behind the item frame).
Then the birch planks broke and the item frame and the item in it came off and were items on the floor.
Cannot confirm in 14w05b.
In creative mode the first left click on an item frame removes the item in the frame, the second left click removes the item frame itself.