This plugin works great for me except for getting the expanded/contracted icons to show up. I've added the additional css code to my .css file, made sure the url is pointed to the right template directory, downloaded the .png files to the right images folder, but they just don't show up. I've tried Chrome, Firefox, Safari, Opera, and IE browsers but no workie. I've looked at the source code results of the web page one it's rendered and the class="mooblock-title and class="mooblock-el shows up where they are supposed to.
When I view the page in the Firefox developer tools they show up though. I'm going to send the author an email to ask if he's experienced this.
Works great otherwise.