WordPress MU

Hi, the organisation I'm working in has a userid / email address standard of firstname.lastname

I'm hoping to continue this standard in our WPMU install and it kinda works, but not consistently...

If I add new users from SiteAdmin > Users > Add User (wpmu_users.php) I can successfully add in usernames such as firstname.lastname.

If however, I or a blog admin attempt to use the same naming convention from Blog > Users > Add New (wp-admin/user-new.php) I receive the error

Only lowercase letters and numbers allowed

Which is correct?

There are also further discrepancies between how users are added across WPMI:

Site Admins add users (emails automatically sent to new users) and Blog Admins (can Skip Confirmation Email)

Any clarification / help around this would be much appreciated.

Pip

There are a lot of things that site admins can do that blog admins can't do. This is just one example of that. If you have an existing user database, though, you could consider using a plugin that hooks into that. We use an ldap plugin to query active directory. That allows our blog admins to add people with first.last type names as long as they're already part of our ldap group.