For anyone who is interested in a response from Philips on this problem:

"Dear Mr. Smith,

Thank you for your enquiry.

We have checked the time zone settings and we must agree with you something is wrong with it. Therefore, we had immediate contact with the Pronto development team and they will take a closer look at the matter. As soon as we have more information available, we will contact you again."

Interesting that no one else in the UK has commented on this problem - I can't be the only UK owner of an iPronto. Also, interesting that it wasn't spotted by beta-testers during the extended period it was being tested......