I was just yesterday reading The Tux magazine on my 770 on the couch. They use a wide screen format with two to three columns. Lots of images, a brilliant magazine indeed. Works really fast on the it 2006 too. While I was reading it though, I had problems reading it comfortably. If I used the fit to width -option, which I love, the font was too small to be read at a relaxed distance. Fortunately 770 has excellent zoom options. I zoomed in once or two times, depending on the page and reading was a bliss. ... Until I had to change page. In fit to width mode, you can just press arrow right to go to the next page. Unfortunately that means that I have to zoom out two times to fit width mode, press next page button and then zoom in two times before I can read the next page. That's 5 presses to get to the next page. Unfortunately that's often not even enough. The right button press registers much too easily two presses when I press it just once, after which I have to try to go back one page with the left button. Left button naturally behaves just like the right one. The same applies to the image viewer.
Well, to get things more comfortable, I noticed that I can switch to normal mode from the fullscreen mode and use the icons at the bottom of the page to go to the next page and then I'd switch back to fullscreen mode. Only 2 button presses and one screen tap to go to the next page. Quite an improvement, but still, there is no reason why it needs to take more than one press.
Enter navigation middle button. At the moment it is used to switch to fullscreen and back. But what's the need when 770 has a dedicated button to just to do that. So, it figures that a change is needed. How about using the navigation middle button to go to the next page (or show the next image in image viewer)? It would be a simple solution and the current button behaviour would not be missed.