Interesting that the other likes come back--definitely points to only an issue in the ajax code, but maybe the main code not pulling in the username is what is causing the missing ARG. Seems like someone needs to go through both the ajax code and the regular one and see what's not coming through from the db because it all seems to be there.

Is there any other place to like a post other than on the post itself? I can't remember if the individual post view is using a different php module (viewpost.php vs viewthread.php).