WP 2.8

[tokyoreporter]

I am using Revolution Magazine for this site: http://www.tokyoreporter.com/

Yesterday I upgraded to WP 2.8. Everything went down immediately. I thought the problem might have been the plugins. So I deactivated all of them. And the site looked somewhat normal. Posts looked about right. For example:

http://www.tokyoreporter.com/2009/06/12 ... hitecture/

But the main page http://www.tokyoreporter.com/ cuts off about half through its loading. So I reverted back to 2.7.1. And the result is the same. My error log says:

[11-Jun-2009 21:29:48] PHP Fatal error: Call to undefined function the_content_limit() in /var/www/vhosts/tokyoreporter.com/httpdocs/wp-content/themes/revolution_magazine-21/home.php on line 64

My home.php file for the area where it breaks looks like this

<div class="thumb">
<h2>JASPO</h2>

<?php $recent = new WP_Query("cat=342&showposts=7"); while($recent->have_posts()) : $recent->the_post();?>

<div class="thumbleft">
[img]<?php echo get_post_meta($post->ID, [/img]" alt="<?php echo get_post_meta($post->ID, "Theme Name", true); ?> thumbnail" />
</div>

<div class="thumbright">
<?php the_title(); ?>
<?php the_content_limit(140, ""); ?>
</div>

<div style="clear:both;"></div>

<?php endwhile; ?>
</div>

Is there anything I should change?

Everything was working fine before I switched to 2.8. Now that I am back to 2.7.1 I am very confused as to why I am getting this error. Thank you very much for any help.