Have you try new sw realeas 5.2. In see in Cisco documentation to watch out for port number and you firewall ACL. But there is no info what exactly is going on with port after upgrade from LWAPP to CAPWAP. Do LAP stay with LWAPP port 12222 and 12223 or after conversion and reboot change port (5246 - control, 5247 - data).
Does any one have some info about this ?