I installed today the german language pack "smf_1-0-beta4p_german" and there seem to be some language strings missing in ManagePermissions.german.php:
$txt['permissions_option_deny'] = 'Verboten';
$txt['permissions_option_set'] = 'Erlaubt';
ciao.. Iggi
http://www.simplemachines.org/community/index.php?topic=6791
Daniel is already working on it ;D