If you go to the sci-fi blog it still shows the favicon from the beta instead of the new one.
The correct Favicon shows for me, and I was one of the last people to see the correct one for the regular site.
It is most likely a caching issue similar to the one that I, and several other users, experienced. It seems that some browsers (in my case, Chrome) have significant delays in updated Favicons, and instead rely on cached data in some way that is not quite clear.
Hard refreshes of the browser sometimes help, but sometimes it appears that simply waiting a few days will be required.