Karen, I had the same issue but I've found a solution and it might help you.
If you have mod your osc with CSS Buttons then you need to do the followings:
Open html_output.php under includes/functions folder:
add the following code before the end of the document ?>
// Original tep_image_submit
// Outputs a button in the selected language
function tep_image_submit_ori($image, $alt = '', $parameters = '') {
global $language;
$image_submit = '<input type="image" src="' . tep_output_string(DIR_WS_LANGUAGES . $language . '/images/buttons/' . $image) . '" border="0" alt="' . tep_output_string($alt) . '"';
if (tep_not_null($alt)) $image_submit .= ' title=" ' . tep_output_string($alt) . ' "';
if (tep_not_null($parameters)) $image_submit .= ' ' . $parameters;
$image_submit .= '>';
return $image_submit;
}
For each tep_image_submit you use for wishlist, you need to change it to tep_image_submit_ori.
for instance on your code:
<td align="center"><?php echo tep_image_submit('button_wishlist.gif', 'Add to Wishlist', 'name="wishlist" value="wishlist"'); ?></td>
change it to:
<td align="center"><?php echo tep_image_submit_ori('button_wishlist.gif', 'Add to Wishlist', 'name="wishlist" value="wishlist"'); ?></td>
hope this helps.
Bru
New 
