You know, when I got the proof, I was immediately struck by the idea that the font looked wrong, somehow--not like a real book font. And then on a whim I opened the book I am currently reading and compared it. And the font is exactly the same. It should be noted that the font in no way struck me as weird or amateurish or not book-like when I started reading that book.
When I'm a little nervous about stuff, I sometimes switch into this hyper-critical mode, where nothing seems right. It's not a very helpful frame of mind....