The Apple guys seem not to care at all. These are extracts from the replies I got (names removed):
Greetings! My name is ****** your iTunes Store Advisor for today. Thank you for contacting iTunes Support. I'm sorry for all the inconvenience it have caused you regarding the jewel case issue in iTunes. As of the moment, this case was still under investigation and iTunes is still working on it.
As a remedy for this issue or irk around provided, you can transfer the content to a MAc and then print the CD jewel case insert with the desired theme from there.
On replying to the above, trying to get the matter escalated within their organisation, I got told that I could call Applecare, who would tell me about complimentary and fee based support! So that's that then!!
A bit like David and Goliath - anyone got a slingshot?!!