I'm still having trouble logging in. As far as I can tell, if you have the "Remember me" box checked, you get a redirection loop error when you try to log in and you continue to get this error until you clear your cookies. If you don't have the "Remember me" box checked, the login just doesn't register. It just boots you back to login.php whenever you hit the "Login" button. There is no message about having an incorrect username or password (and I know that I entered the correct username and password). I know that in the past it took two tries to get in, but now it seems that even ten tries isn't enough.
EDIT: I'm not sure if studentdoctor.net and mdapplicants.com run on the same server(s), but if they do, perhaps this is related. The navigation bar across the top of the site is rendering incorrectly (it has a white background instead of a blue background), and some, but not all, images are failing to load.