I encounter a bug on the DEMO 4 version, that you can see by doing this:
click on a thumbnail to display big pictures. Then click very fast on the background of the "big pictures slideshow" to close it (you have to close it before the big pictures are loaded).
Then try to click on a thumbnail again, you will see a bug in display (the big pictures slideshow will be around 10 pixels width).
If your question is related to the topic of this post, you can post your question to this page by clicking the "Post a reply" button at left;