First off, great product you guys have. My members are just loving it.
I have noticed a possible bug? Usernames with a '&' in them don't seem to work (error message is "no user found") when using the rewrite method.
Also, when changing a user's username on the forum, it doesn't change their name in the z_user table. I had to do it manually. Maybe a "rebuild" function would help
That is all.
Keep up the good work!