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Having installed the 'filter by comments' plugin which "Adds query vars (comment_count, comment_count_compare, orderby_last_comment, orderby_last_activity) for filtering posts by comments". Then adding- <?php query_posts( 'orderby_last_activity=1&paged=' . $paged); ?> -to the top of my index page, all of my posts are now being displayed exactly how I want them to be. ie whichever is most recently updated comes to the front. However when a tag is clicked, the results page is obviously the archive page, which this plugin doesn't appear to work on, leaving posts being shown in order they were published rather than updated. When the above line of code is applied to the archive.php file, it simply pulls every post from the blog and displays them as if its the index, nothing is filtered but they are displaying correctly. Is there a way I can hack that code to sort just the archive results? Looking through the archive.php file, the only I think I should be looking at is - <?php if (have_posts()) : while (have_posts()) : the_post(); ?> -as it comes directly after the filtering code and directly before the article. I am not a complete novice with php, I'm learning fast, this one is just beyond me. How about the query.php file? I'm terrified of that one but my solution may well be in there. Any sort of response appreciated.