title: Some users receive untrusted SSL certificate warnings
body: <p>I've been getting reports of users visiting our site getting "this certificate is not trusted" errors when visiting our site via https. I don't seem to ever have any problems, but two separate people on my team have gotten this error randomly when they're on a different wifi network other than the one at our office. They don't have the same problem at the office. </p>
  
  <p>I read up on intermediate certificates but this seems to be just a browser thing, not a network related issue. </p>
  
  <p>I have an SSL cert from GoDaddy, it's on a Rails app running on nginx + unicorn.</p>
  
  <p>Does anyone have any other ideas why this might happen? I'm pretty stumped.</p>