The problem is not the reader, I've tried others but they all have it. And it works perfectly on store bought books. It's just the ones I've bought in cbr and try to convert that give a problem (and I don't want to spend double money).
I think it's a problem in the xhtml of the pages, but I've tried (probably) every form of setting margin, padding, border, ... I could think of.
My question is: What do I need to do to make the images full paper size?