Been using the older version without any problems. The updated version brings a little different look and feel. The user interface seems to be pretty reliable but zooming in on any page causes problems. I have the current iOS and the zooming-in problem persists. For me, this is a 100% of the time problem with the magazines I view. Random chunks of the document will zoom extra wide and overlay the parts that zoom correctly. This normally results in the parts you want to read being buried under the "broken" parts. If you zoom back out, the page corrects itself. There seems to be a threshold of good zooming to distorted zooming "chunks". Occasionally the app renders the page useless until you bump back a page then forward again. Will probably be looking for a different PDF reader soon to replace this one.
Gadget Guys about PDF Pro - Reader Editor Forms