Setting tabs cache option to false not working in IE

Setting tabs cache option to false not working in IE

I've got a simple page that has a JQueryUI Tabs panel loading content via Ajax.
 
The content source pages are all PHP pages and the content will change frequently so I don't want caching.
 
I've set the cache: false option and it's working perfectly in Chrome and Firefox.
 
However, the tab content is always cached in Internet Explorer 8 and 9.
 
This is for an Intranet-based application and all my clients use IE8.
 
Any suggestions?
 
Thanks,
Mat