I did not try every font, so I will when I get home. But the font I tried the difference with the 2 font size seems pretty extreme.
As for the question about the adobe registration, I did everything on the WIFI. I registered to the sony store and then I could go to the public library website. I did get an error on the adobe ID but I just close everything and then everything worked fine. I want to add that I had registered my email address with adobe using my android phone months ago so I have no idea if that helped in any way.