Joe Payne,

 

That means the uploader is not able to load Flash/Silverlight , and after 5 seconds, it will convert to IFrame mode.

 

So it also do not allow multiple select for that issue.

 

There's many reason that the browser not load the addon.

 

Please try different PC/browser/network , that will help you and me to find the reason.

 

Regards,

Terry