Okay, here's my situation. I'm on the USPS website trying to print a shipping label that's suppose to be in PDF format. according to the USPS site, I need to have Acrobat Reader installed which I thought I had with Leopard. but for some unknown reason, when I try to pull up the shipping label, nothing happens. it won't print at all. what am I doing wrong? do I need to manually install Acrobat Reader to get this label to print or what?