In IE, Firefox, Chrome and most Windows-based interfaces that I\'ve used, the Tab key can be used to navigate from one form field or hyperlink to the nex
Opera traditionally thought this was a feature, not a bug (we had and have other key shortcuts for navigating links, when you know those you might find it useful to have distinct navigation for links and form elements - tried shift+arrow spatial navigation yet?). To some people it still is a feature. True anecdote: once upon a time an internal build made links tab'able by accident and this caused so many bug reports and complaints it was promptly reversed. (As far as I remember, also because the tabbing was buggy in other ways).
We know, however, that tabbing to links is something most users expect and that we should implement a pref for this like Safari has. In the meantime, you can add something like your JS fix above to a user javascript to have tab navigation to links on all websites out there.