I got to try a 700 at the sony style store a couple weeks ago, and they let me put my own sd card in it to try some epubs on it (which convinced me to buy).
I put that same card into it yesterday (after I gave the bride the 700) with some additional epubs I've been working on, and the new ones don't work so good - I get "page errors", or the margins are 2" all the way around. Boy, did I look inept. (sympathy, cards, and flowers, please - my delicate male ego took a beating

).
So the question is: there were some files put down on the SD card by the unit I tried before I bought - what are they? Looks like some xml files and database files - could they be messing up the new epubs?
I made all the epubs the same way in Calibre. And I've opened a ticket on it.
-bjc