Scrollbar missing in Collapsible Panel

Hi all,

I was wondering if anyone else had run into this issue with the Collapsible Panel in Internet Explorer 10 and above.

I have a collapsible panel control which when opened, depending on the content inside the panel, sometimes requires a vertical scrollbar to be displayed.

In IE9, Firefox and Chrome this works fine but as soon as someone opens the panel in IE10 or above the scrollbar doesn't show.

Any ideas???

Many thanks, G.