For preview it would be a solution sure, and a better one than the ones i had in mind at that. But its not a general solution is it? We have many pages with this issue. Basically any page that has a form on it that doesnt involve creating something has this problem. For instance while testing my new inbox stuff Grandfather noticed the problem existed there.
I think its the kind of thing that can be worked around much of the time, but a general solution would be good, although I suspect that its far too late for that.