UI Tabs - Tabs are getting mixed up/go blank

UI Tabs - Tabs are getting mixed up/go blank

I'm using jQuery UI Tabs for the tabs on the following page:

http://announcements.telegraph.co.uk/

The problem is that occassionally the tabs go blank (upon auto change). You can reproduce the issue in IE, FF, by randomly clicking the tabs in rapid succession*, so it appears to be a timing bug of sorts that messes up the tab state? After a bit of clicking you'll notice the tabs just display blank.

Any thoughts appreciated.

Simon