Hi Wayne,
Sorry about the delayed response.
We are able to reproduce the reported issue 'DateTimeCombo allows to select beyond range for years' and we do not have any workaaround for this issue. We have logged defect report and fix will be available in our next Service pack release, which is expected to be available by the end of November 2014. We request you to visit our website periodically for updates regarding releases.
Please let us know if you have any queries.
Regards,
Vignesh V