Using the enlarge button from within the saved pdf document (usually found by moving the mouse to the bottom of the document where it then remarkably appears to use)is the only way to increase view without the dreaded crash.
Maybe they can put one of those magnifying glass widgets into the saved folder as I usually only want to view 1 or 2 things not enlarge, enlarge, enlarge then scroll up/down left/right to find what I was looking for.
By the way one of the few things I like about Windows 8 is viewing PDF's is better