title: lvh.me:3000 no longer resolving to localhost:3000 for testing subdomains in development
body: <p>I followed <a href="http://railscasts.com/episodes/123-subdomains-revised" rel="nofollow">Railscast 121</a> to set up subdomains for my site, <code>www.blog.com</code>, and got everything working in development. I could use lvh.me:3000 to access my application at both the root url <code>www.blog.com</code> and at the specific subdomains I set up e.g. <code>john-doe.blog.com</code></p>
  
  <p>After pushing to Heroku, I can no longer connect to the root url at lvh.me:3000. What could be causing this?</p>
  
  <p>Symptoms in development environment:</p>
  
  <ul>
  <li>I can access <code>www.blog.com</code> through localhost:3000.</li>
  <li>I cannot access <code>www.blog.com</code> at lvh.me:3000. but CAN still access <code>john-doe.blog.com</code>.</li>
  <li>I opened a DIFFERENT application <code>www.secondapp.com</code>, and the root path for this also works at localhost:3000 but not at lvh.me:3000. I have not set up any subdomains for secondapp, but tried the url <code>john-doe.secondapp.com</code> just in case, and for some reason, this works. Very strange...</li>
  </ul>
  
  <p>I must have inadvertently adjusted some files, but I don't know where/how. It's completely beyond me why a completely different app would work with a subdomain for an unrelated app. Any feedback would be much appreciated. </p>