I, too, have been having the same problem. I recently wrote a 300-page book. I tried to upload it to Barnes & Noble, but it wouldn't take it because the fonts in the PDF weren't embedded. (Amazon's set-up automatically embeds them for you.) So, when I checked to see what the problem was, it was the ArialMT font, which stymied me, because I wrote the entire thing in Bookman Old Style. I combined two PDF sections together for the completed book -- the first nine pages with the title page, copyright info, table of contents, etc., and then the actual book, beginning with the first chapter. I was able to narrow the problem down to the first nine pages. Your comment about bullets was the lightbulb moment for me. At first, I thought, "But, I don't have any bullets!" Then, I remembered that I did -- I had mentioned three points in my Preface, and I numbered them 1, 2, 3. There you go. Once I took care of that, no more problem. That'll be good to remember, as I am pretty certain this won't be the only time I'll have to mess with it. Thanks.