I have spent over 2 hours trying all solutions on this forum and couldnt get my thumbnails to show (example: lukalavrisa.com/kamnosestvo/sl/spomeniki ). I am using Jooml 3 and SIG, files, names etc. are ok, so is server configuration. In cache there are even OK thumbnails that were generated. Can someone help?

I have find out what was wrong. Since I have been using module called Hot Film Tape there was some kind of conflict. I have turned of Jquery loading in Hot Film Tape module and everything is working fien now.