Ian, if you're trying to change it for
existing posts, it's probably stored in the database with the post.
Try this query for a post which still says anonymous.
SELECT B_AnonName FROM w3t_Posts WHERE B_Number = xxxxxxx
If it says Anonymous, then it's the name stored with the post. It'll display the name they enter when they made the post (the quick reply doesn't let them enter a name).
You can either reset these via SQL command, or turn off the option in the config file to allow users to choose a name, then it'll use the "anonymous" language string instead.
