With previous firmware versions I could enable/disable automatic approvals. I just updated to 22.214.171.124.186 and it seems the approval option is permanently enabled, you are not able to click the option. Has anyone else noticed this? It's caused some minor headaches when running multiple APs on the same network that I did not want to be connected together.
After harassing over this for a couple of days, i ended up managing my two Unleashed networks, by adding the corresponding switchports untagged to different VLANS and different IP subnets and got it done that way.