This is kind of funny - running 8.5.161 on a 5520. I accidentally clicked on "Feedback" on the main WLC menu, I get an external web page:
Cisco Network Management Product Feedback
For which Cisco product would you like to give feedback?Prime Infrastructure 2.1 and earlier
Network Control System
Wireless Control System (WCS)
Wireless Controllers
Access Points
Mobility Services Engine (MSE)
Obviously, no one ever clicks of Feedback!