I am using the latest Image Gallery Pro plugin. When I opened a photo, the photo will be shown. However, to close the picture, I need to click twice. It seems he opened 2 times the same photo. A little bit different to explain.

See for my test page: www.jeroen.eu/index.php?option=com_content&view=article&id=50%3Afoto-album&catid=34%3Ademo-category&limitstart=1

Anybody an idea?

It seems that it loads slimbox.js twice on this page (see page source code). Try selecting another popup engine for the SIG Pro plugin to see what happens.

It seems that it loads slimbox.js twice on this page (see page source code). Try selecting another popup engine for the SIG Pro plugin to see what happens.

I am sory I do not have not too much knowledge of Joomla, but I want to learn. Could you help me to give a little bit more info were I have to search.  like page source code? 
and were can I select different popup engine?  Thanks for your help in advance

You will have to go to Extensions->Plugin manager, find SIG Pro and on the parameters on the right where it says Popup engine for image galleries select Slimbox2 (powered by JqQuery).

Yes, now it works! Great.  :)

One more question, if you look to my thumbnail, some of the window / shadows are not complete. Some shadow, especially on the top is missing. Is this something to do with the adjustment of the size?  However, the left lower picture is ok.

Regards jeroen