The image upload module has a setting --
module_imageupload_usesmarty -- that outputs smarty variables instead of displaying the image so that you can have complete freedom of how you want to display your images in link_summary.tpl.
In
image_upload_settings.php set
module_imageupload_usesmarty to true. This will then create 3 variables: module_imageupload_thumbnail_src, module_imageupload_image_filename, and module_imageupload_image_caption.
In link_summary.tpl after the image upload preview code insert:
Code:
<a href="{$story_url}"><img src="{$module_imageupload_thumbnail_src }/{$module_imageupload_image_filename}" /></a>
This will create a thumbnail image that links to your story page instead of displaying the full size image.
If you want the full size image to still be displayed on the story page you could probably use this:
Code:
<a href="{$story_url}"><img src="{if $pagename neq "story"}{$module_imageupload_thumbnail_src }/{/if}{$module_imageupload_image_filename}" /></a>