I run a private wiki that requires HTTP authentication. (This is on Unix/Apache, using .htaccess. [Raq_Apache_dot_htaccess]) There are only two people using it, but we both use several different hostnames/computers/browsers, and it is not very convenient to re-set the preferences every time. Since I am using HTTP authentication, I made the following modification to have Tavi automatically use the HTTP auth username by default.

Add to config.php:

$UserName = ($_SERVER['PHP_AUTH_USER'] ? $_SERVER['PHP_AUTH_USER'] : '');