Hi Markus,

I'd like to be able to accommodate usernames with 2 characters (rather than the current 4). Can I do this myself and, if so, how?

As always, thanks for your help.

Sure, you can do that (though this isn't in configuration yet -> I'll move it in). Here's how.

Crack open /core/members.php, find function show_registration() and the following section (line 445):

        if (strlen($data['member_username']) < 4)
        {            
            $errors[] = $lang['username_too_short'];
        }

And then do the needful. =) And the language string is under /languages/en/lang_members.php at #43.

I'll throw this into the config files for the next release; for now, just change the above.

Thanks Markus, much appreciated.

Update: that should read /ajax/members.php not /core/members.php 

Yes, sorry: /core/ajax/membes.php. It's the only folder with unprefixed files -- with everything else, if you know the filename, you know the location.