I have just a baisc instant cluster setup with three SSID's: Staff, Student and Guest network. At random, an AP will periodically stop handing out IP addresses to our Staff and Student VLAN and sometimes others will reboot. The Studnet and Staff are using the network assigned default VLAN and I attatched the screen shot of the fault history. I'm not sure what I may have configured wrong, but I can't seem to find the answer.
Also this is the verison I'm currently running with the IAP 205's: 6.4.2.0-4.1.1.0_46028