How do I keep my scene layout from getting messed up when resizing my windows?

Question

Whenever my scene window gets resized the layout gets messed up. This included when I move or resize other views in my workflow in such a way that it changes the size of the scene window (see screenshots). This makes Unity nearly unusable. How do I prevent this nonsense?

Correct scene layout:

Messed up scene layout:

Answer 1

I figured it out. The camera has several layers of background to it. I had to go to each one and click the "enable the constrained proportions" button.