Last modified: 2013-08-15 19:37:00 UTC
Just upgraded to Firefox 23.0 and now it's showing mixed content warnings (support.mozilla.org/1/firefox/23.0/WINNT/en/mixed-content/) for the English Wikipedia. I checked the Dutch, German and French Wikipedia and I'm not getting the warning there. On the main page of the English Wikipedia I don't see any images using http, but at https://en.wikipedia.org/wiki/Five_Points,_Manhattan I see that http://upload.wikimedia.org/wikipedia/commons/0/0a/Wma_event_11.png is being loaded. This gives me https://commons.wikimedia.org/wiki/File:Wma_event_11.png and goes to https://meta.wikimedia.org/wiki/WikiMiniAtlas. Not sure what is causing this exactly, might be in https://meta.wikimedia.org/wiki/MediaWiki:Wikiminiatlas.js, but not sure.
Hmm, I fail to reproduce this on two Fedora machines with Firefox 23 (one being logged in, one not). Are there any specific preferences?
Fresh day, fresh debugger. Turned out that some crappy code in https://en.wikipedia.org/wiki/User:Multichill/vector.js was causing this.....