Postet the error to http://kav.in/forum but no help within 2 months. Now I noticed, that the accordion also does not work on the KAVIN demo website http://kav.in/projects/blog/wp-ui-tabs-accordion-sliders-demo/ with IE8 or IE9.
The tab is working. The Accordion within the Spoiler also not.
Nevertheless, all features are working with
- Firefox and Win7
- Chrome and Win7
- Safari and IOS 6.1