Hi Scott,
Thanks for the reply. I created the new fields exactly the same way you described it to me. I tried it again but it did not work i.e. did not work on IE8. It works great on Firefox. This is some kind of IE feature, or one of my settings is wrong.
I'm still not sure where the new fields end up though. I received the new tabs on the tabbed interface but they are blank.
It is too late now, I'll play with this again tomorrow and let you know the result.
Thank you for your help.
Laszlo