Yesterday I had the same problem. Both Firefox (3.5.4) and Chrome (3.0.195.27) refused to load the page. Chrome gaved me Error 310 (net::ERR_TOO_MANY_REDIRECTS). I am running WP 2.8.5.
I have changed the siteurl (option_id #2) and home (option_id #39) options (option_name column) in [wp-prefix]_options table from https://domain.com to https://www.domain.com — it solved the problem.
I guess it is some kind of strange configuration of Apache that is causing this but I must add that yesterday I was moving my localhost WP installation to that server (although the previous version of WP was doing just fine with the domain given without www. in the database).
