We have a pair of C5210 EWCs running 10.31.04 with mostly 3935 APs and some 3825 APs. When we add a WLAN service to an AP the AP shuts down the radio for about a minute and a half. All clients are disassociated and have to re-associate when the AP turns the radio back on. In cases where we use load groups (which is the usual procedure) to activate a WLAN service on multiple APs at once this action causes some of the APs to re-boot. I can not pinpoint when this started but I am sure it is fairly recent (within the last 6 months) and that adding WLAN services never turned the radios off previously.