Quote Originally Posted by mc12345678 View Post
On your "test" server is it also setup to have a subdirectory within the HTTP_SERVER and secure version of the same?

I'm thinking that the code in the image_handler.php file which references using DIR_WS_CATALOG where in your case is setup as / but is acting like /xxxxxxxx/ is possibly causing this issue.

Might suggest modifying line say line 752 of image_handler.php for you from:
Code:
 echo zen_image(DIR_WS_CATALOG . $preview_image, addslashes($pInfo->products_name), $width, $height) . '<br />';
To:
Code:
 echo zen_image('/xxxxxx' . DIR_WS_CATALOG . $preview_image, addslashes($pInfo->products_name), $width, $height) . '<br />';
Where '/xxxxxx' is the "hidden" portion of your uri in the admin/includes/configure.php.

Might have a better solution later if that is successful. Preferably one that doesn't require any further editing.

On test site HTTP_SERVER is http url and HTTPS _SERVER is https.

Your suggested code change works - it displayed the thumbnail for the large image. I copied your suggestion into lines #727 and #737 which then produced the small and medium thumbnails as well. (Yay! Thank you!)

The strangeness in my HTTP and HTTP_SERVERs was to do with comodo SSL certificate on a shared hosting site. I previously used my store url in the config files and I kept getting a 'sort of' secure indication message- green but with lock icon unlocked, and I was unable to get the comodo seal displayed on my site. When I chased it down it turns out that with shared hosting I have to use the /host's specific server/my user name/ in place of /my store url in the config files.

I had done all that before doing the 1.5.5a andIH4 update and had entered new products in the store but hadn't added any new additional images via admin/tools/IH4

Thank you so much for your assistance.