Since I upgraded to the current beta version, my Favicon has stopped displaying on any browser.
I used the Wizard to upload a different .png favicon and refreshed my browser - to no avail.
On one of these attempts, Chrome (on Mac) showed an alert in the URL bar which said “The site is attempting to load scripts from unsecure sources - do you want to allow this”; I said yes and then the favicon instantly appeared. (Note it is a very new site to which nobody has posted other than me and the only possible scripts would be related to Google Adsense.)
Now the site is back to no favicon; also the URL bar alert is no longer there.