I got jQuery conflicts problem with other plugin that use jQuery too.
Since this plugin use jQUery from ajax.googleapis.com and this cause error while the order of script in head has loaded.
After search the site I found that many people have this problem.
https://diggdigg2u.com/support/topic/wp-zoom-slide-show-not-working#post-350
https://diggdigg2u.com/support/topic/floater-only-appears-after-scrolling-mystique-theme#post-428
https://diggdigg2u.com/support/topic/recieving-error-message-conflicts#post-402
TO FIX ERROR:
1. Find "DIGG_FOLDER/include/dd-help.php"
2. Find pattern "dd_enable_required_js_in_wordpress"
3. Comments all jQuery stuffs
Original...
wp_deregister_script('jquery');
wp_register_script('jquery', 'https://ajax.googleapis.com/ajax/libs/jquery/1.6.0/jquery.min.js');
wp_enqueue_script('jquery');
Change to ...
//wp_deregister_script('jquery');
//wp_register_script('jquery', 'https://ajax.googleapis.com/ajax/libs/jquery/1.6.0/jquery.min.js');
//wp_enqueue_script('jquery');
---------------------------------------------
So, this should be fix to more compatible with other plugins.
If not comment this out, I suggest to check that jQuery already loaded or just use self hosted jQuery instead
wp_enqueue_script('jquery');
Thanks.