setting more 1 or 0 won't trim the_content

So many things fail easily now in multisite wp that didn’t fail with a single blog…
I’ll only mention one in this post: Posts are ALWAYS shown in full.

I’ve tried setting $more =0 , 1, moved the variable up and down the code…
I’ve tried setup_postdata($post) everywhere…
I’ve tried installing the theme in another site…
I’ve tried uninstalling plugins…

The posts have no manual excerpt nor more tag… I just want the automatic excerpt to be generated automatically.

Is there anything else I can try?

Below is the code

if (have_posts()): while (have_posts()) : the_post(); ?>
              <article class="entry" id="post-<?php the_ID(); ?>">
                <header class="postheader">

                  <h2><a href="<?php the_permalink() ?>" rel="bookmark"><?php the_title(); ?></a></h2><?php echo'<span class="postinfo postdate">'. get_post_snippet( 'CityName' ) . ', ';
				the_date('', $span_w_city,'</span>'); ?>
                </header>
                <div class="post_content">

		<?php global $more; $more = 0; the_content(__('(full article...)')); ?>
                  <?php the_tags(__('<div class="postfooter postinfo">Tags: '), ', ', ' — </div>'); ?>
              	</div>
                <!-- end Entry -->
               </article>

<?php endwhile; else: ?>