my rb600 came with 3.10 and worked great. upgraded to 3.16..
router reboots every few hours nothing in log.
units sometimes stays online but hotspot users cant access the net but can reach gateway
users connected to other rb relays cant access internet, after main AP with hotspot rebooted, all okay
worst of all.. i have a 3.10 backup in rb600 but when i select it to restore, says okay will restore and reboot unit. after reboot the damn thing is still 3.16
The new models of the rb600 come with already updated bios and should not (theoretically) present such problems. Try to lower the processor frequency to test.