In the file ManageSmileys.dutch-utf8.php for 2.0 is a small error on line 44, you won´t be able to edit smileys in Admin.
$txt['smileys_delete'] = 'Verwijder smiley'';
// Don't use entities in the below string.
should be:
$txt['smileys_delete'] = 'Verwijder smiley';
// Don't use entities in the below string.
It is the double '' thats bugging it!
Doesn't appear bugged in the language editor. I've reported it to the dutch translators. Thanks