Q:

HTTPS favicons on beta sites still use HTTP

Directly related to my last meta post that was status-completed – the favicons on beta sites for the site stats widget doesn't actually use HTTPS, but redirects down to HTTP instead, resulting in the same issue as before.
https://stackexchange.com/favicon.ico -> http://sstatic.net/stackexchange/img/favicon.ico

Here's a curl fetch with trimmed headers:
➜  ~  curl -v https://stackexchange.com/favicon.ico
*   Trying 104.16.14.128...
* Connected to stackexchange.com (104.16.14.128) port 443 (#0)
* TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
> GET /favicon.ico HTTP/1.1
> Host: stackexchange.com
> 
< HTTP/1.1 302 Redirect
< Server: cloudflare-nginx
< Content-Type: text/html; charset=UTF-8
< Location: http://sstatic.net/stackexchange/img/favicon.ico
< 
<head><title>Document Moved</title></head>
<body><h1>Object Moved</h1>This document may be found <a HREF="http://sstatic.net/stackexchange/img/favicon.ico">here</a></body>

A:

This has been fixed, and will be available in the following builds:

SE.com: build 2911
Area 51: build 376
MSE/MSO: build 3737
other Stack Exchange sites: build 2860

