Commenting here too because I want to see when you get an answer!
How do I change http://example.com/forums/user/username (which is currently showing)
to http://example.com/forums/user/nickname (which is what I want to show)??
I’m having a very similar problem and want notification when you get an answer!
Mine IS showing http://example.com/forums/users/username, but I WANT it to show http://example.com/forums/users/nickname.
This is especially frustrating since I don’t want the people who will be using my site to have access to my login username!