Oh yeah,
The other thing I changed in my install was to turn autocomplete to on (again, in main.inc).
line 1446ish:
$input_user = new textfield(array('name' => '_user', 'id' => 'rcmloginuser', 'size' => 30, 'autocomplete' => 'on'));
I suppose it can be argued that it's a security risk, but I think it's too handy to disable... especially for an e-mail system.
Perhaps it can be made into a config option?