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Akamai Technologies, Inc.: What is this error message that "Safari can't verify the identity of the website 'static.ak.facebook.com'?"

Note it is NOT the correct "s-static.ak.facebook.com" and even though I have reset Safari, removed all cookies, history, etc, it's still giving me this error. Running Mountain Lion. It keeps popping up almost constantly, no matter what websites I go to, including, e.g., Quora.

More info:

-for example, every single time I refresh this page, I get the error.

-I've been advised to delete the file com.apple.security.revocations.plist from the Home Library Preferences folder... but there is no such file.

-Solved! If using Lion or Mountain Lion, the file is com.apple.security.plist, full instructions in answer below

UPDATE: weirdly, the problem is now happening on mobile Safari on iOS 6: Akamai Technologies, Inc.: What is this error message on Safari for iOS that "Safari can't verify the identity of 'static.ak.facebook.com'?
1 Answer
Marc Hoag
Marc Hoag, Co-Founder Twibble.io, a startup that helps you get more value out of Twitter
Solution found! It was sort of a gamble: I didn't have the exact file "com.apple.security.revocation.plist" but I did have a very similar one, "com.apple.security.plist" and I thought I'd remove it and see what would happen. And... it seems to have worked! No more annoying warning! Case closed? I think so!

Note: com.apple.security.plist seems to be the file for Lion and Mountain Lion systems; earlier versions of OS X may still use the com.apple.security.revocation.plist file. If you have an older version, try removing the .revocation file first.

So, simply do the following:

  1. Quit Safari
  2. Go to Users/[Your Home Folder Name]/Library/Preferences
  3. If you can't see the Library folder, then go to 4, else go to 7
  4. Launch Terminal (command-space, type Terminal, press Enter)
  5. Type chflags nohidden ~/Library and then press enter
  6. Quit Terminal, go to 2
  7. Find the file com.apple.security.plist and drag it out of the folder (don't delete yet until you're sure)
  8. Restart computer (just to be sure)

That's it!

Question remains, what caused this in the first place though?