My Scene is messed up?

did you some how switch to orthographic camera?

Try selecting a game object and then press F in the scene view.

I had a copy of Unity on a $$anonymous$$ac once, and it was the only place where this problem happened for me. As @ffxz7ff said, focusing will fix the problem. From what I have read, unity automatically adjusts the editor camera's clipping planes when you focus, but not necessarily when you zoom or fly with R$$anonymous$$B. So if you somehow tried to focus on something with a very large bounding box (I am not sure what actually happened to you, probably just a glitch with the same effect), and then tried to zoom in on your normal objects, they would get cut out by the near clipping plane. I guess this is just another example of Unity and $$anonymous$$onodevelop not working completely correctly together? (On that same $$anonymous$$ac, $$anonymous$$onodevelop would crash trying to load Unity scripts. It would load anything else just fine.)