SOLVED: The website does not supply identity information

[Ben [KVR]]

That makes the assumption that the resource is also available on valid https, which we can't.

Try this for example: https://i63.tinypic.com/2jcj8f5.jpg

"i63.tinypic.com uses an invalid security certificate."

Or https://www.patchpool.de/pics/patchpool_1b.png

"Secure Connection Failed"

If you click the "more information" button, you'll see why. There are 5 images included via HTTP instead of HTTPS in this thread.
Ironically, it's all posted screenshots and Sampleconstruct's signature.

The KVR guys just have to update their code so that post and signature images are not included through hard-coded HTTP links. Easiest fix would be to simply remove the "http:" part from the "http://" URLs, that would pick the HTTP or HTTPS protocol automatically.

[4damind]

It seems redirecting to https is not set correctly with kvraudio. https://kvraudio.com is redirected to the insecure http://kvraudio.com. https://www.kvraudio.com is working correctly.

Anyway, some well known problem with mixed content over insecure connections. Something which hardly can be solved with such a forum where users/3rd party stuff is linked over http instead of https.
I moved some times ago with some of my hosted websites to https (and Spdy) and had the same problem. But with a web where you have complete control over the content it's easier to fix this.

[#rob]

That makes the assumption that the resource is also available on valid https, which we can't.

Yup, noticed that just moments after posting. For some reason I thought the images are forum uploads, not external ones.

[Ben [KVR]]

It seems redirecting to https is not set correctly with kvraudio. https://kvraudio.com is redirected to the insecure http://kvraudio.com. https://www.kvraudio.com is working correctly.

Fixed now (the redirect may be cached for you though)

[Numanoid]

The issue is solved for me now, so I close the thread.