The new version of Safari that comes with Mac OS 10.4 has been giving me (and lots of other people) problems when trying to use it with pages authenticated by UW NetID (via our use of the PubCookie web authentication software).
Because of that I switched back to Firefox as my main browser, and I also notice that FF seems much faster than Safari.
I don’t find having a built-in RSS reader in the browser enough of a compelling reason to use a browser that breaks on lots of pages. I’m plenty happy using Bloglines to read my RSS feeds.
I know the C&C security middleware team is busy trying to resolve the problems with Safari and PubCookie – maybe this will get better over time.