My Imate 9502 gets behind time during the night but not every day. I've asked clove about it but no results at the moment/ Has anyone the same problem?
I wonder if you have your "Start > Settings > Personal tab > Phone > Network Timne tab > Automatically update Time Zone information from Network" ticked. If so, try to untick it, and make your device synchronize its time with ActiveSync instead. By the way, mine is set this way.