I am not Alfred Hendrickson.
I am logged in with his credentials to try to figure out why HE can't log in.
For him: IE 8 on Vista.
For me: IE 8 on Windows 7.
Try clearing your cache. (http://kb.wisc.edu/helpdesk/page.php?id=12314)
Testing with a standard user. "One observation is worth 10,000 expert opinions."