Login Problem – Key does not appear to be valid

Whenever I attempt to login the username and password blank out and the login page remains. But if I click on lost the password link and the email is sent to reset the password.

When I click on the reset link in the email I receive an error message that says the Key does not appear to be valid. But if I go back to the login page and reenter the original username and password I immediate get access to the admin page.

This also appears to adversely affect my ability to setup a blogsite in my youtube account.