wp-jquery-lightbox V 1.4.5 suddenly not working

It could be that I updated a few plug-ins (although I have done it before), but jquery-lightbox plug-in has suddenly stopped working. All galleries have gone from nice to just sending me to image in the blog post?! when I click on image. The link goes directly to the image file.

http://www.samuiconnection.com is my site. Every listing has a gallery. I found jquery lightbox very convenient and simple. It worked well until now. I haven’t made any changes in the code and all plug-ins are pretty much the same as they were for quite some time. I checked header.php and footer.php to make sure that everything is OK there, after reading these lines :
Make sure your theme calls wp_head() and wp_footer() correctly.

I also have found someone’s solution by moving lines of code in header.php… not sure how it was done, but my experimenting didn’t give me any good results.
There was recent update of WP to V.3.6.1… May be this has something to do with my issue?! Any help will be appreciated.