Do any of you have issues with Pdf files and preview. I opened one up on my early 2009 Mac mini and it basically freezes the system up, it becomes very in responsive till I close preview. The Mac mini is 2.0 ghz and runs an SSD with 4gb ram. I was looking at activity monitor nothing seemed out of place so I don't know why the system just freezes like that. With Adobe reader it works much better and the system does not freeze.