I like the idea of remapping the camera button so that gets my vote. I personally don't have a problem with the way the back button works now as I can just use the backspace on the keyboard if I want to go back 1 page immediately, but if I have visited multiple pages in a thread or numerous websites then clicking the onscreen arrow which displays my recent history is just as good as I just do a quick swipe and click to get me back to where I want instead of having to click backspace numerous times (not got a problem with doing that either). I certainly wouldn't be returning my device because of the way the current back button works.