in the "Quick Install" part of the docs, after:
"Or, if you prefer to not be prompted every time you log in:
<?php
$i=0;
$i++;
$cfg['Servers'][$i]['user'] = 'root';
$cfg['Servers'][$i]['password'] = 'cbb74bc'; // use here your password
"
pma 3 needs an additional line:
$cfg['Servers'][$i]['auth_type'] = 'config';
(because default is 'cookie' now).
Merged in subversion, thanks.