If you offer a service online, hire or appoint a user-experience stickler whose role would be to review your website’s key customer touch points. Create a checklist, make sure error messages are warmly delivered and accompanied with additional direction. And please, try not to leave your customers hanging after you’ve given them the red font.

A simple link: “Forgot your password?” could solve this.

Surely there are bigger usability violations committed on the web. Picking on Tumblr just happened to be convenient at the time of writing. This little violation should not be used against Tumblr – after-all, one can argue the “blue log in” does the trick.