Brief We have added some extra code to files 'previews.html' and 'previews_functions.php' for version 3.6.
Description Previews images for products were not always displayed (depending on the files you were using) if using an option 'Use player for preview'.
Further, extract the above mentioned files into the 'includes' folder (in the Binary mode) and to the 'templates/user' folder of your shop. Do not forget to make a backup copy of the current files in case something goes wrong.
