Suppress tags with only 1 post associated

Firstly, I made a post regarding this in Plugins / Hacks at
http://wordpress.org/support/topic/412855

but I’m not sure I posted in the correct board, so apologies for posting twice on the same subject, but I’m not sure if I explained myself properly in the first post anyway.

It strikes me that when tags are displayed underneath a post, it seems pretty pointless to display a tag if the only post it has associated with it is the post you are reading. I think it makes more sense to suppress the displaying of tags until they have two or more posts associated with them. I have managed to achieve this is a single post by modifying my theme’s (Mystique) single.php from:

<?php
              $tags = array();
              $i = 0;
              foreach($post_tags as $tag):

               $tags[$i] .=  '<a href="'.get_tag_link($tag->term_id).'" rel="tag" title="'.sprintf(__('%1$s (%2$s topics)'),$tag->name,$tag->count).'">'.$tag->name.'</a>';
		    $i++;

              endforeach;
              echo implode(', ',$tags); ?>

to:

<?php
              $tags = array();
              $i = 0;
              foreach($post_tags as $tag):
		if($tag->count > '1')
		    {
               $tags[$i] .=  '<a href="'.get_tag_link($tag->term_id).'" rel="tag" title="'.sprintf(__('%1$s (%2$s topics)'),$tag->name,$tag->count).'">'.$tag->name.'</a>';
		    $i++;
                    }

              endforeach;
              echo implode(', ',$tags); ?>

This works fine for when you are looking at a post’s actual page – but when that post appears on the main home page, all the tags are displayed, including those with only 1 post associated with them.

Can anyone tell me where the code is that generates the tag links when they are displayed on a multipost page? Thanks