query_posts() including pages instead of posts

I’m using the following code / query to output the most recent default post type:

<?php query_posts('post_type=post&posts_per_page=1'); ?>
<a href="<?php the_permalink(); ?>">
	<img src="<?php echo getPostThumbnailUrl('feed-news-footer'); ?>" alt="<?php the_title(); ?>" />
</a>
<a class="date" href="<?php the_permalink(); ?>"><?php the_time('d M Y'); ?></a>
<h4><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h4>
<?php wp_reset_query(); ?>

However it is outputting a page instead on a default post type.

Has anyone else had this problem?