Every day the time zone on my 8310 changes to Eniwetok (-12) from EST. I seem to notice this after a sync with my pc using desktop mgr. The time zone on my pc is set to EST. I've had the berry for a couple of months and this just started happening.
I think I figured it out. In desktop mgr, I unchecked update device date and time in the synch menu. I recently upgraded to v. 4.3 of desktop mgr and I think that caused the problem.