Hi Bjørn, The code in the current version has changed quite a bit from version 3.0.17, so in the case of your site there is a different cause: The theme is loading up an older version of jQuery. You or the theme author will need to update the theme to use the bundled version of jQuery that is included with WordPress for plugins that depend on jQuery to work as expected. This is a fairly common issue and we’ve written about it in our blog: https://eventespresso.com/2012/08/using-jquery-in-safe-mode/
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