How: Post list with image?

** I tried post in “WP-Advanced”, but only moderators can move things round **

Hey, folks. I’m trying do some lists (recent post, popular post, more commented…). Ok, that’s easy and working.

But I want return the first image from the latest post.
Example:

Recent
Image Here

• 3***
• 2
• 1

Popular Post
Image Here

• First popular***
• 2nd popular
• 3rd popular

And so on. I wanted return the image from the latest post in the list (marked with ***)

The problem: code (below) almost worked. It returns image, but from the wrong post. From “oldest” instead the new one (1 and 3rd popular).

This feature is a widget, and yes. It has more code, but I guess only this part is important.

$ultimos = new WP_Query($query);
            $i=0;
            if ($ultimos->have_posts()) : while ($ultimos->have_posts()) : $ultimos->the_post();		

                        $content = get_the_content();
                        //search image
                        preg_match('/<img[^>]*>/i',$content,$matches);

                        //process image
                        if($matches){
                            preg_match('/src="[^"]*"/i',$matches[0],$src);
                            preg_match('/width="(\d*)[^"]*"/i',$matches[0],$width);
                            $img = "<img $src[0] align='center' title='".get_the_title()."' width='130px' height='113px'  />";
                        }
                        else $img = "<img align='center' width='130px' height='113px' src='".get_bloginfo('template_directory')."/images/semfoto.jpg' title='".get_the_title()."' />";

                $titles[] = get_the_title();
                $links[] = get_permalink();$i++;
                endwhile; ?>               

            <div class="widget-img">
                <h3><?php echo $instance['title'] ?></h3>

                        <?php echo $img;?>
                <ul>
                        <?php for($j=0;$j<count($titles);$j++) {
                           ?>
                        <li>
                                <a href="<?php echo $links[$j] ?>" rel="bookmark"><?php echo $titles[$j]; ?></a>
                        </li>
                        <?php } ?>
                </ul>

            </div>

        <?php
                endif;

        }

Any highlighted? :/