I tried it again and it work just like I wanted thank you very much.
Mistake: <h1 class="title"><a href="<?php echo $taxo_text; ?>"><?php single_cat_title( '', true); ?></a></h1>
Fix: <h1 class="title"><?php echo $taxo_text; ?></h1>
What I mean is that when you create a category.php file, you can write “the_category();” for the h1 title. That gives you a link and the name at the same time.
What I want to accomplish is to do the same for for the taxonomy.php file but the_category(); doesn’t work when the the taxonomy.php file is queried.
Thank you for the help I think that worked, since the post without the thumbnail is not appearing. Also for the link which led me to this http://codex.wordpress.org/Function_Reference/query_posts#Custom_Field_Parameter. It explains how the ‘meta_key’ can include only stuff that equals the value of that parameter.
Note: I have belief that this is a shorthand only available for version 3.1 of wordpress.
