I uninstalled modest on the weekend and removed all gconf entries associated with modest. I have not had a reset in two day while using statusbar clock and personal menu. I have OMWeather installed but disabled.

I am pretty sure I read that modest uses an alarm set in alarmd to poll for mail when you allow it to automatically check. I do not use alarms with statusbar clock, but I have read that some people do and are getting this reset issue. Perhaps this is a bug in alarmd?