It is beautiful, although I dislike the headers myself; personal preference of a book barbarian, I'm sure. It just seems like wasted space; I' not prone to suddenly forgetting where I was in a book and who wrote it.
But it all goes to sh~t the moment you press the zoom button. Why would this matter? One of the great benefits of the reader for my mother is that despite worsening eyesight she can still read in a zoomed mode. It has given her the ability to read again. Even I like to change to a bigger font in the evening when my eyes are tired. It is one of the great things about ebooks IMHO.
I've watched the various suggestions in the PDF thread on how to combat this (stuffing multiple versions in a single file, for instance) but they all seem like kludges. Anyhow, it has certainly given me food for thought (and something to read!), so thanks