I have an MSM760 controller with about 198 AP's (MSM317) and after the upgrade to the V5.7.0.3 software some of the AP's will start rebooting every three minutes. After some time the AP's give up and show as disconnected on the MSM760. If you go to the POE switches (HP 3600SI) the AP's are connected to and turn off poe then enable the interface and turn on poe the AP will come back up and run for a random period of time.