Over the last 5 or so weeks I've had 3 seperate incidents where my treo 600 did a hard reboot and erased all my data. First was when I put my phone down perhaps a little hard in car cup holder (did not throw), but other two were completely without a cause in advance. Sole correlation is they have happened within two - three weeks of each other. Never had issues with this treo in the past.

Any thought? I'm at a loss for attempting to solve and thought my data is backed up, I do allot of travel and would hate to loose data on trip. Any thoughts or ideas appreciated. Thanks.