bug Summary:

What I expected to happen was...:
I expected to place water from my bucket and have an empty bucket ready to pick it up.

What actually happened was...:
I placed the water and the bucket was removed from the hotbar. I had to open my full inventory to select it.

Steps to Reproduce:
1. Get an empty bucket or bucket of water
2. Place or pick up a water source block
3. Where did the empty bucket or now full water bucket go? Open your full inventory and find it there. Only works in 0.7.1, not 0.7.0