Hi,
There's a suggestion and a little little bug.
1) In fullscreen mode(and even in normal mode) we can zoom the image only using the mouse scroll ball, and it's not very intuitive for the user. So, you could put a little scroll bar in page navigator, it could be used to change the zoom level.
There's an example of this behavior in pagesuite.com solutions, here's the link:
http://www.clicrbs.com.br/zerohora/jsp/default.jspx?uf=1&action=flipNote that when you zoom, a little scroll just appear without the navigation.
By the way, the zoom mode of this flip is really good

You can see the "chapters" shown vertically in the side of the pages, it's really nice.
2) Maybe it's a bug.. the message "Press ESC to quit fullscreen" that appears when you zoom fullscreen mode, cannot be changed? It's not in lang configuration?
thanks!