gmolo

I never found anything that corrected the faulty get_posts(). So I had to create my own workaround:

This code shows only posts and filters out the pages that incorrectly return from the get_posts() method by continuing to increment the offset until the full count is reached of just posts.

// construct query
    $params = array(
    	'numberposts' => $numberposts,
    	'offset' => $offset,
    	'post_type' => 'post'    // doesn't work?
    	);
    $posts = get_posts($params);

    // filter out pages
    $pageCount = $pages = 0;
    $filteredPosts = array();
    do
    {
        $pageCount = 0;
	foreach($posts as $p)
	{
	    if (strcmp($p->post_type, 'page') == 0)
	    	++$pageCount;
	    else
	    	array_push($filteredPosts, $p);
	}
	if ($pageCount != 0)
	{
	    $offset += $numberposts;
	    $numberposts = $pageCount;
	    $params['numberposts'] = $numberposts;
	    $params['offset'] = $offset;
	    $posts = get_posts($params);
	}
	$pages += $pageCount;
    } while ($pageCount != 0);

    // Final array
    return $filteredPosts;