Anyone experienced problems with JAWS v 20 & iTunes?

Hi
I'm running JAWS 20 on the latest version of Windows and having not used the iTunes web site for some time, I tried it this evening and discovered that every keyboard command I tried came up with the message "Unknown script call to ....". I've had a quick search through the FAQ's but haven't seen anything relating to JAWS v20. Has anyone else experienced the same problem? And if so, any ideas of how to get around it other than totally avoiding iTunes web site itself?!