Duplicate text and SMS messages on Blackberry

One of my users recently started having a problem with receiving duplicate text (or SMS) messages on his Blackberry.  This would happen to the majority of messages he received, but not all of them. And some would only have one duplicate message but others might eventually have 5 or 6 copies of the same message.  Sometimes the duplicates would show up with different dates as well.

I think something was corrupt with the text message database on his phone so I wanted to wipe out all text messages and see what happened.   So I connected his Blackberry to my laptop running the Blackberry Desktop Software and made a full backup of the phone.  Then in Blackberry Desktop I went to Device -> Delete Data and selected both "Text" and "SMS" entries just to be sure. 

After wiping out those databases, his duplicate text message problems seems to be gone. For now anyway. :)