- Using Comments Plus... If you click the button to "Sign

Hi - Using Comments Plus...

If you click the button to "Sign in with Twitter," the popup tries to access https://api.twitter.com/ - saying, "Sorry, that page doesn't exist!" then redirects to the page with "Authorize [My App Name] to use your account?" and a blue "Sign In" button (even though I am already signed into Twitter). It seems to work from there, but why this redirect? Some hasty users are likely to close that popup before it gets to the correct page...

Twitter app is set to "Read and write", Consumer Key and Secret are correct, no spaces, Callback URL is the URL of my site. I have also tested with the Twenty Twelve theme and all plugins disabled, with the same results.

Thank you for your help.