Can't Log In with Yahoo
We made a change to our login system in 2010 that broke compatibility with Yahoo OpenID logins. It's fairly easy to reconnect your account, though.
First, go to our password reset page and enter your email address. This will generate a new password and email it to you. With this password, you can log in normally (in other words, not using Yahoo) using your username and new password. From there, go to Edit My Account and scroll about halfway down. You will see all the login providers, including Yahoo. Click and Yahoo and run through the login process. This will reconnect your Obsidian Portal account to your Yahoo account, and you will be able to log in with Yahoo after that.