If by dpad navigation is meant individual 'clicks' of the dpad moving from link to link then please make it optional. I dislike it in MicroB because if I scroll down a long page using the scrollbar then click the dpad down wanting to scroll a small amount, it will instead select the next link, possibly at the top of the page, and so lose my scroll position. I was very happy when I found that Tear would allow me to use the dpad to scroll around without having to worry.