Mi rispondo da solo! :)
Sono riuscito a farlo funzionare con query_post()
Codice PHP:
<?php query_posts(array(
'order' => 'DESC',
'paged' => $paged,
'posts_per_page' => 4
) ); ?>
<?php if ( have_posts()) : while (have_posts()) : the_post(); ?>
<article>
<header>
<a href="<?php the_permalink(); ?>" title="Vai all'articolo completo">
<?php if (has_post_thumbnail()) {
the_post_thumbnail('blog-thumbnail');
foreach((get_the_category()) as $category) {
echo '<img class="label" src="http://www.studioandco.altervista.org/peter/wordpress/wp-content/themes/peter/images/label_' . $category->cat_name . '.png" alt="' . $category->cat_name . '" />';
} }
?>
</a>
<p>Di <b><?php the_author_posts_link();?></b> - <?php the_time('j F Y'); ?></p>
<h1>
<a class="perma" href="<?php the_permalink(); ?>" title="Vai all'articolo completo"><?php the_title(); ?></a>
</h1>
</header>
</article>
<?php endwhile; ?>
<footer>
<div id="navigation">
<div class="align prev"><?php previous_posts_link('« Più Recenti') ?></div>
<div class="align next"><?php next_posts_link('Meno Recenti »') ?></div>
</div>
</footer>
<?php endif; ?>