title: "Website: Not a valid URL format" when creating an application of twitter
body: <p>I'd like to create an application that can integrate with Twitter.
  So I went to the website: <a href="https://dev.twitter.com/apps/new">https://dev.twitter.com/apps/new</a> to create an application.</p>
  
  <p>But the WebSite: field always failed. It said that "Website: Not a valid URL format".
  I tried different "valid" URLs, but failed.</p>
  
  <p>Do you have any ideas on the twitter application?</p>
  
  <p>Thanks in advance.
  Michael</p>