system clock 30 min fast after reboot

["Todd A. Jacobs" <nospam codegnome org>]

My system clock always reads 30 minutes fast after a reboot. I set my
system clock daily using rdate, followed by setclock to set the hardware
clock. I don't experience any significant time slippage when the system is
running normally. However, after any reboot, the time is always around 30
minutes fast.

Other than a bad battery, what could account for this behavior?

-- 
Todd A. Jacobs
Network Systems Engineer