Can access the site with my password but can't navigate different linkpoints. "View/Sort transactions" click brings up the proper page for a second, then redirects to a "this page is currently unavailable" page. Using Firefox 28.0.

This problem is limited to the Citi site.  I regularly access and navigate commercial bank and credit union sites, and several other credit card sites, without even a hint of a problem.  One element of the Citi site has NEVER worked: the Log Out button.  These problems have plagued Citi, on and off, for a long, long time.