If it is practical (and you are not recording anything ! ), it's always a good idea to do a "power cord pull" after a major software update - i.e. grab the AC plug, pull it out of the outlet, wait 20-30 seconds, and plug it back in.
It clears the memory more effectively than the daily reboot or even a power button reboot.
I had once had timers fail to fire right after an upgrade, but I noticed no one else reporting that symptom in the Forums, so I tried a power cord pull, and thereafter all timers have fired without fail.
So, it seems a good "maintenance procedure" to be safe.
On the other hand, plumbers say that you are supposed to turn off and drain your water heater every so often (every year ?), but I hardly ever do that...
