1. you find the version written in your admin dashboard.
2. you have a problem with the shadowbox, on the consule is shows "shadowbox" function undefined.
It can be cause by many different parameters.
Are you using shadowbox wordpress plugin or manual implementation ?
If Plugin, try to delete the plugin, download a new version, and install again .
also , your shadowbox script loads at the END of your page (footer ) try move it to header . you have many nasty JS comming from facebook, twitter and the lot (including Iframe ..)
- it takes a really long time to actually LOAD all (even if the page seems already loaded ) - and it can interfere with the JS executions.