When loading TeX.SX over TLS (e.g. Force equal hinting when combining symbols) with HTTPS Everywhere, images are not displayed.

Firefox shows this error (e.g. for https://i.sstatic.net/k1rDN.png):

An error occurred during a connection to i.stack.imgur.com. Peer reports it experienced an internal error. (Error code: ssl_error_internal_error_alert)

  • Can you please hit this URL and paste the result? Your specific IP isn't necessary, you can remove that piece. i.stack.imgur.com/cdn-cgi/trace Commented Oct 28, 2015 at 22:01
  • Is this what is causing all SE hosted avatars to fail to load in chat?
    – ɥʇǝS
    Commented Oct 28, 2015 at 22:02
  • @NickCraver All of i.stack.imgur.com is returning: "i.stack.imgur.com uses an invalid security certificate. The certificate is only valid for ssl330558.cloudflaressl.com (Error code: ssl_error_bad_cert_domain)"
    – Mysticial
    Commented Oct 28, 2015 at 22:07
  • 2
    Certificate presented doesn't belong to i.stack.imgur.com (issued only to ssl330558.cloudflaressl.com, no alternate names) and both image URLs and that trace thing result in 403. Commented Oct 28, 2015 at 22:07
  • You can try with http only, @Mysticial
    – Oded
    Commented Oct 28, 2015 at 22:08
  • @NickCraver: With http (https gives a 403): fl=48f8 h=i.stack.imgur.com ts=1446070144.771 visit_scheme=http uag=Mozilla/5.0 (X11; Linux x86_64; rv:41.0) Gecko/20100101 Firefox/41.0 colo=DUS spdy=off loc=DE Commented Oct 28, 2015 at 22:10
  • @Oded my school appears to disallow imgur.com simply because of the lack of TSL (or similar). Is this fixable by you? / is it an unrelated problem?
    – Tim
    Commented Oct 28, 2015 at 22:17
  • @NickCraver I get similar - fl=21f130 h=i.stack.imgur.com ts=1446070560.828 visit_scheme=https uag=Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36 colo=LHR spdy=3.1 loc=GB And can see the image he linked...
    – Tim
    Commented Oct 28, 2015 at 22:18
  • @Tim - if they block imgur.com (note that we are on a subdomain i.stack.imgur.com), that is not something we can help with :(
    – Oded
    Commented Oct 28, 2015 at 22:19
  • Hmm when I'm back there in a week I'll speak to them. I seem to remember a TLS error (???) but not sure. This seems like an unrelated problem tho i guess.
    – Tim
    Commented Oct 28, 2015 at 22:20
  • @MartinSchröder Is this fixed for you? It's all fine for me... And has been for the whole day.
    – Tim
    Commented Oct 28, 2015 at 22:20
  • Oh, so that's why some images have trouble displaying suddenly. I'm not even browsing via HTTPS...
    – AStopher
    Commented Oct 28, 2015 at 22:39
  • @NickCraver broken for me as well (over HTTP): fl=63f12 h=i.stack.imgur.com ts=1446071939.274 visit_scheme=http uag=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2547.0 Safari/537.36 colo=MAN spdy=off loc=GB Commented Oct 28, 2015 at 22:39
  • @NickCraver I get a certificate error with that: i.imgur.com/wjWAiec.png. Looks like an issue with Cloudflare again. Man, SE's had so many problems with them lately..
    – AStopher
    Commented Oct 28, 2015 at 22:41
  • 7
    Thanks for the reports everyone - we're prodding CloudFlare who's in front of i.stack.imgur.com and has incorrect certificates in some colos. It's not directly our account, but hosted in behalf of imgur for us so resolving takes a bit more time. We'll get them to correct the cert issue ASAP. Commented Oct 28, 2015 at 22:43

1 Answer 1


This was a certificate fail on the CloudFlare side on the Imgur account hosted on our behalf. We're still awaiting info on what exactly happened, but since it's not directly our account we may not get this information.

The fix should be rolling out shortly around the world - we prodded both sides to have new certs issues ASAP and we are now seeing valid certificates in most locations (our New York sysamins aren't seeing it yet).

New cert details

  • Valid From: Tuesday, October 27, 2015 at 8:00:00 PM EDT
  • Valid To: Thursday, October 27, 2016 at 7:59:59 PM EDT
  • SHA1: 96 BD DF 71 49 F8 C6 D9 A8 6E 2D E1 D3 5D 2F 00 6A 90 0C ED
  • MD5: 90 13 A3 FD B5 61 F4 B5 E9 8D DC 8B D7 9D BE C5
  • SAN entries:
    • i.stack.imgur.com
    • imgur.cloudflaressl.com
  • 1
    See you all again next year guys!
    – Tim
    Commented Oct 29, 2015 at 18:32

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .