I have Controller 4404 with 40 1020AP's. when I'm testing our enviroment I found strange behaviour on some application. clients with 802.11g card haven't any problem they works fine, but few people used oldest standard 802.11b card and they have problem with client-server application, for example they could login to Lotus Notes server, could read email but couldn't send it. There is few diffrent application with the same behaviour. for test I disabled support 802.11g on controller device and with homogeneous wifi enviroment problem with application disappear.
On this wlan I have PEAP authentication with SecureID OTP token, but authentication passed correctly. I used last version of software 3.2.78.0
Maybe somebody observe such like behaviour ?