Meta slider not working on home page (but did before update)

I’m using meta slider plugin on a new theme I’m working on and had it working well.

I then upgraded to WordPress 3.6 and also installed the latest version of the plugin. I guess one of these updates broke the home page (note the problem is only on the homepage). The slider code is in the header file so should be the same for all pages/posts I suppose.

Also, the slider is working in Safari, but not the other browsers.

I think the problem relates to the following lines of code as the these “@import url …” are missing when I inspect elements for the home page (but are there for other pages…)

<backticks><style type=”text/css”>

@import url(‘https://test2.londresparaprincipiantes.com/wp-content/plugins/ml-slider/assets/metaslider/public.css?ver=2.2&#8217;);
@import url(‘https://test2.londresparaprincipiantes.com/wp-content/plugins/ml-slider/assets/sliders/nivoslider/nivo-slider.css?ver=2.2&#8217;);
@import url(‘https://test2.londresparaprincipiantes.com/wp-content/plugins/ml-slider/assets/sliders/nivoslider/themes/default/default.css&#8217;);

</style></backticks>

Any help/suggestions would be gratefully appreciated

The site is test2.londresparaprincipiantes.com