wp_update_post not updating

wp_update_post is being called from within the loop (via loop.php) to update the author ID of posts during certain cases, but is not updating the author.

if ($BLAH) {
$temp[results] = wp_update_post(array('ID' => $post->ID, 'post_author' => '10'));
echo "Updated ",$post->ID," with an author of '10'.. Was set to ",$post->post_author,"<br>"; print_r($temp[results]);
}

Debug returned from the above echo is:

Updated 42971 with an author of ’10’.. Was set to 11
42971

wp_update_post is returning the post->ID on execution, but post_author is unchanged.

Any help on this would be great. This is a short order project and the deadline is, well, days ago. I’m hung up and pulling out my hair.

I also tried a simple MySQL UPDATE statement of UPDATE wp_posts SET post_author=’10’ WHERE ID = ‘###’; but calling via $wpdb->query returns 0 – However a run of the statement inside PHP My Admin changes the value and returns 1.

I’m perplexed.