If you go to a pre-pub product description page on logos.com that has "Sample Pages from the Print Edition" and click on one of the image thumbnails, then attempt to page through the pages using the left/right arrow buttons, you are constantly stymied because as you click on the arrow button, the size of the box that displays a graphical image of a page changes, so the position of the arrow changes. You can't just keep your mouse in one place and go click-click-click.
Here's a demo from this page: http://www.logos.com/product/42288/family-portraits-character-studies-in-1-and-2-samuel
http://www.screencast.com/t/5wmv2JJa
See how I have to keep repositioning my mouse in order to click through all the pages? There's no reason for that. Please make all the page sizes uniform, on this and every product description page.