mine gets reseted to default values (and others viewtopic.php?f=2&t=1373&p=6626&hilit=bios+reset#p6626) - no fixes so far...
Edit: Just read viewtopic.php?f=2&t=1082&p=6459&hilit=bios+reset#p6459
"Could you look at one old problem in Xpenology - BIOS goes to reset state
(there are several reports for different hardware configurations) when power-off shedule is enabled?"
I have scheduled power-off, what about you?