This seems like a new problem that may have started with the last software update. (Note, by dead I don't mean areas that don't light up -- just areas where the touch screen isn't responsive)
Specifically, the first bookmark in the bookmarks bar in Safari seems to be non-responsive, defaulting instead, when touched, to the bookmarks button above, instead of the bookmark itself (hope this makes sense)
Also, noticing the same issue with Notes. The first note requires multiple taps before it is highlighted and even then, it takes a long time to load.
Other applications, such as stocks, YouTube videos, etc. seem fine when tapped in that same area.
I think this make be an application specific problem as opposed to hardware but would be great to find out if you're having the same problem.
I've had the iPhone for over a month and did not have (or perhaps notice) this issue despite heavy use ....
Thanks, for your help.