Add topic button in new bookmark dialog

Picking up from my previous semi-successful attempts at moving bugs 
which need a decision making forward:

http://bugzilla.gnome.org/show_bug.cgi?id=110640
Add topic button in new bookmark dialog

On one hard, our resident usability expert says No to this and so do 
Apple. Most other browsers say Yes to this, and our users seem to want 
it. Personally, i'm undecided :p

Anyone have any further opinions?

Thanks,

-Piers