Text of the newly registered users group in the user registration settings needs some slight rewording.
language/en/acp/board.php

From
[code]'NEW_MEMBER_GROUP_DEFAULT_EXPLAIN' => 'If set to yes and a new member post limit is specified newly registered users will be not only put into the <em>Newly Registered Users</em> group, but this group also being their default one. This may come in handy if you want to assign a group default rank and/or avatar the user then inherits.',[/code]

suggested...
[code]'NEW_MEMBER_GROUP_DEFAULT_EXPLAIN' => 'If set to yes, and a new member post limit is specified, newly registered users will not only be put into the <em>Newly Registered Users</em> group, but this group will also be their default one. This may come in handy if you want to assign a group default rank and/or avatar the user then inherits.',[/code]