UnassignedReferenceException for assigned variable

I’m having a problem with Unity 4.3. I seem to be getting these errors:

All of them are the same. Normally, this wouldn’t be a big deal; I would just set the value of pauseButton (a SpriteRenderer) in the Inspector. There’s one problem, though:

20349-assigned.jpg

I did set the value in the Inspector. And the errors continue. Does anyone know what is going on? Any help would be greatly appreciated.

The problem appears to have solved itself; the errors no longer appear.