custom query_posts excluding a certain meta_key

I had the same problem over here: http://wordpress.org/support/topic/get_post-query-where-posts-dont-have-a-specific-meta_key-1 I don’t think there is a clear solution for this problem so I made a sql query to do this.

You can also try this before the loop (not tested) :

<?php
$myposts = get_posts('numberposts=-1&meta_key=mykey');
$result = array();
foreach($myposts as $mypost) {
setup_postdata($mypost);
$result[] = $mypost->ID;
}
$args = array(
'post__not_in' => $result
);
query_posts($args);
?>

This gets all the post ID’s with the specific meta_key (mykey) and then excludes them from the query.