So far I've only really noticed "resume" feature as new.
So far all of the other problems I've had with sites (websites not working/rendering wrong, but not website-side problems/browser detection problems/etc) that I've checked are still there, popup browsing does not allow an "exclusion" option (loud resounding "duh"?), no way to prompt user each time where they want to save files, still clutters my download directory (instead of some temp directory) any time I need to view a non-HTML file.
Safari was always fast for me before, but then I don't think Mozilla is bad. Maybe it's the systems I'm running it on =)
What I also haven't seen is a feature that doesn't exist in another (or most other) browsers.
So what is it that you like so much better about 1.2 versus 1.1 or other browsers, Scott?