About time! I've been seriously annoyed a number of times when doing text/data entry (on this very site!) where somehow I removed focus from the input, and then tried to erase some text, only to find it going back a page, and my input is gone when I browse back forward (this problem is exacerbated by inputs that don't exist until Javascript creates them from some page event).

When using a laptop with a sensitive touchpad, this can get really bad.