My employer has an employee accessible web site with pertinent information that can be accessed from any location (home in my case - I can view my pay, vacation hours, etc.). I recently began having problems logging in and viewing the site. The only thing new on my machine is Firefox 3.0.10. The same problems exist with Safari. If I set Safari to id itself as IE 7, I'm in with full access. It's odd in that the company's default browser is FF on a thin client - I don't think it is Windows based. I seem to recall a web site that would display the host OS given the URL of the site.