Number of urls inside a wordpress post

Hi

I have a problem with my wordpress. As I go over a certain number of urls inside one post, the content of that posts simply doesn't show at all anymore in a post page. I got no idea what could be wrong... :S Anyone got and thoughts on that?

Update: there is porbably a problem in my theme, because it works ok if I insert a different theme. I got no idea what could be causing this :S Anyone please?

Update 2: It's a standard loop:

<div class="single_left">
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>

<?php if ( get_post_meta($post->ID, 'logotop') ): ?>

<img class="logo" src="<?php echo get_post_meta($post->ID, 'logotop', true); ?>" />

<?php else: ?>

<img class="logo" src="http://www.ceramictiles.net/wp-content/themes/benzo1.1/images/ct_logo.png" />

<?php endif; ?>

<h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>

<p><?php the_content(); ?><br />

<b>Tags:</b> <span class="post_single_tags"><?php echo get_the_tag_list( '',' - '); ?></span></p>

<div class="post_single_footer"><span class="post_cat"><?php the_category(', ') ?></span>
</div>	

<?php endwhile; else: ?>

Code (markup):

 

Hi, there. I'm not good with code, but can you explain the problem you're having. I'm not clear on what you're saying.