I just down loaded an Adobe ePub book from my library. I loaded it into ADE without any problems. It looks fine when I look at it on my monitor but when I load it onto my Soney ebook reader (PRS-300) the formatting is all wrong. The margins are so wide that I have a small little column of text (5 words in width) in the middle of my ebook screen. I've never encountered this problem before with ePub books.