delphin you're brilliant - you don't have the connoisseur tag for nothing! You are right, it's the duplicate line at page breaks at uniform intervals. Unfortunately, I only have the MOBI and Epub files and I'm pretty sure the same goes with my friend - I don't think she had a PDF file to begin with, but I'll check with her.
Maybe we can put out the challenge to a script writing guru to see if they can come up with something!
