On August 3rd, I upgraded to the most recent version of WP Super Cache. Since then, the non-www domain no longer redirects to the http://www.domain. It shows an old version of my site from August 3rd.
I noticed someone else had this problem, and read this forum thread:
My problem is that there is not an .htaccess file at .com/.htaccess on my server.
Please advise!! I'm lost, and the many visitors that go to domain.com instead of http://www.domain.com are not seeing my recent content.