title: Chrome and Firefox automatically redirect to https on a certain site
body: <p>I have a drupal site that runs on nginx and php-fpm with haproxy balancing between multiple servers.  </p>
  
  <p>I have two services set up for haproxy: http and https.  </p>
  
  <p>if i go to <a href="http://subdomain.domain.com" rel="nofollow">http://subdomain.domain.com</a>, it works fine.<br>
  If I go to <a href="https://subdomain.domain.com" rel="nofollow">https://subdomain.domain.com</a>, it also works fine. 
  If I then go back to http it now redirects to https.  This happens in firefox and chrome, but not in IE.  </p>
  
  <p>Is there some setting somewhere that redirects to https automatically if it knows that it exists?  Perhaps if a secure header is set?  </p>
  
  <p>I tried looking at LiveHTTPHeaders, but it only shows the https portion at this point.<br>
  I tried looking in Chrome, and it says this: </p>
  
  <pre><code>t=1312233405229 [st=  0] +REQUEST_ALIVE                             [dt=192]
  t=1312233405229 [st=  0]     URL_REQUEST_START_JOB                  [dt=  0]
                               --&gt; load_flags = 1114241 (ENABLE_LOAD_TIMING | MAIN_FRAME | VALIDATE_CACHE | VERIFY_EV_CERT)
                               --&gt; method = "GET"                   
                               --&gt; priority = 0                     
                               --&gt; url = "http://subdomain.domain.com/"   
  t=1312233405229 [st=  0]    +URL_REQUEST_START_JOB                  [dt=  0]
                               --&gt; load_flags = 1114241 (ENABLE_LOAD_TIMING | MAIN_FRAME | VALIDATE_CACHE | VERIFY_EV_CERT)
                               --&gt; method = "GET"                   
                               --&gt; priority = 0                     
                               --&gt; url = "http://subdomain.domain.com/"   
  t=1312233405229 [st=  0]        URL_REQUEST_REDIRECTED              
                                  --&gt; location = "https://subdomain.domain.com/"
  </code></pre>
  
  <p>It seems to be doing a redirect, but doesn't say why.  </p>
  
  <p>I tried sniffing with Wireshark, but wasn't able to make any sense of it, as I can't get the SSL decryption to work (I have the key).  </p>