I have added multilanguage function to my site using Polylang plugin.
Everything works fine on default language pages and posts. After switching language to other, at the bottom of the page there is a list of warnings visible:
Warning: Invalid argument supplied for foreach() in /home/(...)/wp-content/plugins/simple-lightbox/controller.php on line 934
Example page:
http://trochimiuk.pl/2014/03/norway-bjorkedalen/
Please fix it. I like simple lightbox plugin very much and I don't want to look for another.