I've got an odd issue. I just upgraded IH4 to the latest version, 4.3.2, and now my image swap does not work. I did not seem to have this problem with IH 4.2.

Image that was just replaced and image swap is not swapping correct image:

r o s e c i t y v i n t a g e [dot] com/index.php?main_page=product_info&cPath=1_5&products_id=384

Image that for some reason is not being resized, and working correctly

r o s e c i t y v i n t a g e [dot] com/index.php?main_page=product_info&cPath=1_5&products_id=74


My modified code in modules/additional_images.php is in red and TEXT_CLICK_TO_ENLARGE has been removed:

Code:
    $thumb_regular = zen_image($base_image, $products_name, MEDIUM_IMAGE_WIDTH, MEDIUM_IMAGE_HEIGHT);
    $large_link = zen_href_link(FILENAME_POPUP_IMAGE_ADDITIONAL, 'pID=' . $_GET['products_id'] . '&pic=' . $i . '&products_image_large_additional=' . $products_image_large);

    // Link Preparation:
    $script_link = '<script language="javascript" type="text/javascript"><!--' . "\n" . 'document.write(\'' . ($flag_display_large ? '<a href="javascript:popupWindow(\\\'' . str_replace($products_image_large, urlencode(addslashes($products_image_large)), $large_link) . '\\\')">' . $thumb_slashes . '<br />TEXT_CLICK_TO_ENLARGE</a>' : $thumb_slashes) . '\');' . "\n" . '//--></script>';
	//edited for no 'larger image' link
    $noscript_link = '<noscript>' . ($flag_display_large ? '<a href="' . zen_href_link(FILENAME_POPUP_IMAGE_ADDITIONAL, 'pID=' . $_GET['products_id'] . '&pic=' . $i . '&products_image_large_additional=' . $products_image_large) . '" target="_blank">' . $thumb_regular . '<br /><span class="imgLinkAdditional"></span>TEXT_CLICK_TO_ENLARGE</a>' : $thumb_regular ) . '</noscript>';
	//edited for no 'larger image' link
	
      //    $alternate_link = '<a href="' . $products_image_large . '" onclick="javascript:popupWindow(\''. $large_link . '\') return false;" title="' . $products_name . '" target="_blank">' . $thumb_regular . '<br />' . TEXT_CLICK_TO_ENLARGE . '</a>';
$link = '<a href="' .  $base_image . '">' . $thumb_regular . '</a>';
    $link = $script_link . "\n      " . $noscript_link;
     //    $link = $alternate_link;