I had this problem also. I cleared my cookies and active logins, and now they both work.
Oh, and I'm using FireFox.
Thanks for the response and tip!
I thought I had Firefox set to clear everything on exit, but after checking "Settings for Clearing History," cookies and site preferences were unchecked. After checking those, exiting and launching the browser, I can now get to the main page of the site. Chrome now works as well after clecking everything in "Clear Browser Data."
Crazy!