clyde,

unzipped the file and uploaded again. still no joy.

i've checked the final source code. i could see:
<div class="buttonRow back"><a href="http://img.maxsonic.co.uk/st/index.php?main_page=index"><img src="includes/templates/template_default/buttons/english/button_back.gif" alt="Back" title=" Back " width="105" height="29" /></a></div>
<div class="buttonRow forward"><a href="http://img.maxsonic.co.uk/st/index.php?main_page=testimonials_add</a></div>


i can see the add testimonial link but the problem looks like it can't locate the image button.