Sometimes My Phone Just Restarts

Occasionally (maybe twice a month) my **Milestone** just reboots (goes black and then to the Android start-up screen, but not all the way to the Motorola screen). I presume that such behaviour could be caused a poorly written app. I have uninstalled a few but to no avail. Is there any sort of log that I could pull which would shed some light on this or even a dump file? Could this restarting issue be caused by something else? I am currently running **Android 2.1** (no OTA update available for me, yet) on a Milestone and have had this problem since I bought it in December (when it was 2.0).