Last posts problem

I currently use WP 2.x

To get the last posts, time/date and nr of comments I use this code:

<?php $today = current_time('mysql', 1); function truncate($string,$chars,$append = '...') {
if(strlen($string) > $chars) { $string = substr($string, 0, $chars); $trunc_at = strrpos ($string, ' '); if($trunc_at !== FALSE) $string = substr($string, 0, $trunc_at); $string = $string.$append;} return $string;} if ( $recentposts = $wpdb->get_results("SELECT ID, post_title,  post_date FROM gibson_posts WHERE post_status = 'publish' AND post_date_gmt < '$today' ORDER BY post_date DESC LIMIT 50")): ?><?php foreach ($recentposts as $post) { if ($post->post_title == '') $post->post_title = sprintf(__('Post #%s'), $post->ID);
$posttime = strtotime($post->post_date);
$mytime = date('H:i', $posttime);
$mydate = date('d/m', $posttime);
$currtime = time();
$today = date('d',$currtime);
$postday = date('d',$posttime);
if($postday==$today)
echo $mytime;
else
echo $mydate;
echo " <a href='https://www.metalvalley.nl/nieuws/$post->ID/'>";
  $shorten_title = truncate($post->post_title, 26);
echo $shorten_title;
  echo '</a>';
$numcomments = $wpdb->get_var("SELECT COUNT(*) FROM gibson_comments WHERE  comment_post_ID = '{$post->ID}' AND comment_approved = '1'");
echo " ({$numcomments})<br />"; } ?>
<?php endif; ?>

This code takes al the titles of the last posts, date/time and nr of comments. On older versions it worked perfect, but with the newer WP versions (2.x) it also takes titles of the last pages, so pages and posts. How can I exclude pagetitles from this list?