images not showing in multisite setup

hello there,
See thefractal.org/node
all nodes are shared using prefix sharing and everything is working except image nodes...
its strange... the code for the insertion of the image is just not there unless you are on the subsite that the image was uploaded to...
so you can see the node title and link to the node ... but the image is not visible...

for the blank sites i get this as the code when i view the source:

<div class="node">
   <div class="picture"><a href="/en/user/11" title="View user profile."><img src="/misc/no-avatar.png"  alt="Sophie&#039;s picture" title="Sophie&#039;s picture" /></a></div>
  <div class="info">Submitted by Sophie on Mon, 2006-01-02 09:26.<span class="taxonomy"> :: </span></div>
  <div class="content">

  <div class="image_view"><br />
<div class="nav"> <div class="links"><div class="prev">&nbsp;</div><div class="next">&nbsp;</div></div> <div class="titles"></div></div></div>  </div>
      <br class="clear" />

versus this for the site it was uploaded to.. where it is always visible:

<!-- begin content --><div class="node">
      
  <div class="content">
    <div class="image_view"><span class="image preview"><img src="http://puntamona.org/files/images/frog.preview.jpg" width="640" height="479"  alt="frog" title="frog" /></span>
<br />
<div class="nav"> <div class="links"><div class="prev">&nbsp;</div><div class="next"><a href="/en/node/398"><span class="image minithumb"><img src="http://puntamona.org/files/images/_iguana3.minithumb.jpg" width="50" height="46"  alt="Iguana" title="Iguana" /></span>
</a></div></div> <div class="titles"><div class="next"><a href="/en/node/398" title="View the next image.">next</a></div></div></div></div>  </div>
        <div class="info">Sophie – Mon, 2006 – 01 – 02 17:26</div>

where should i be looking for an error?
thanks
ryan grace.
thefractal.org