Oh my god I have the same problem! I have a PRS-600 and I write a lot so sometimes I'll convert a file to PDF to take with me on a commute to work so that I can do some editing on the bus by making notes, then taking it home and comparing it side by side with my document. It worked fine when I did it with my old reader, but dear god it only displays the first few pages, yet the epubs I buy from B&N .com show up just fine! I thought the reader was broken at first but if I can read say, Harry Potter on it, why can't I read my own books? It's so frustrating! They showup fine and at full length on my PC (I run Windows seven on my Dell Inspiron and use Adobe Reader 9) even if I try different free converters online it just wont work!