There was one specific contact that hasn't been synching no matter what I tried. I tried one last thing, which was just logging out of Facebook and logging back in and then repeating the process, and it didn't work.
However, after logging back into Facebook, the Facebook profile pictures don't show up on the Contacts screen anymore. I checked some random contacts and the contacts are synched with Facebook.
Why aren't the photos coming up? What should I do?