This happened to me earlier:

I scaled a model way down (dont ask why), and when I used the select all and pressed F and/or Shift+F , to view selected in all vewports, There was nothing there.

This was the problem;

There were some small objects or residues from such objects in the modelspace that was not noticable by the eye. I had to drag the mouse over the whole screen to see what came up.

Points is, maya seleted my model AND the "invisible" "objects" so the frame all action messed things up.

My model was right in the middle, way small and not hardly noticable by the eye.