Dusten,
Can you check the sent requests area and see if the requests I sent a bit ago are there? They were successfully received and worked for me. So, that's a good start either way. I used Chrome on a Mac to send them, so you know my method, but didn't do anything out of the ordinary otherwise.
If the avatars aren't showing, that generally means that either Facebook is sending incorrect information back about the request, or there is a Javascript error preventing the sending notification altogether. The blank avatars (usually) mean that the ID for the user we store in the database is '0', which then loads a blank avatar from Facebook. Just wanted to let you know what happens, although that definitely doesn't explain why...
Thanks,
Alex