Safari 8 Favorites Bar Favicon Issues
Running Safari 8 / Yosemite on a new rMBP, everything's up to date.
Basically, as you can see, Safari is selectively providing favicons for certain websites and not others. I've Googled my brains out on this issue but everything seems to reference digging into some files that I can't seem to find in Yosemite. Any thoughts as to why or how to fix this? It's minor I know but annoying, as like many of you here I really like being able to browse by icon rather than reading text, and Safari 8 doesn't seem to be doing us any favors in that department.
Update: I had a brainstorm. See the Apple favicon next to the URL in the screenshot? I dragged it into the Favorites bar, and lo and behold, it created a link with the proper favicon! But the next two sites I tried it with (sites I have visited but not bookmarked) no go. I tried three more that I have never visited, and they all worked. What gives?
MacBook Pro (Retina, 15-inch, Mid 2014), OS X Yosemite (10.10)