Can't Login in IE7 or Chrome, Cookie Not Set

From https://help.webfaction.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=168:

If you are using Internet Explorer 7 or Google Chrome ( Chromium ) and are unable to log into [some website], make sure that your computer's clock is set to the correct time, as well as the correct time zone.

IE7 and Chrome both handle web browser cookie expiration times based on your local computer's clock. So if your clock is off, your cookies can expire before they are ever even used.