thanks for the information.
Recently, I started to beta test a new firmware for the Bebook and when I saw the page numbers on the side of the epub files, I thought it was a bug ... so right now it seems as if is a "feature"

What anoys me is: if the page number on the side would always be in the same position, it would be ok. But I noticed, that it changs position. Sometimes, it is up high on the page, then it is on the middle of the page ...
As for html and xhtml ... I am still some kind of novice when it comes to that, so I have to ask: How does it work, if the ebook has pictures ? I mean, files like mobi or epub include them, but html doesn't. So if I put a html file on my ebook reader, I also have to put the pictures in the same directory, right ? Or am I missing something ?