Phil,
Looking at your dump, it appears as if the config being pushed out the APs once they are adopted is "breaking" the connectivity with the RFS. I can clearly see the AP is actually adopting, but then going into Waiting to retry state because it lost contact with the RFS.
The Backup RFS is also doing the adoption, which seems to differ from your show cluster members output of the other day.
Have a close look at the configuration going into the APs with the following command from the RFS:
show run device device_name
This will show you the final, complete, config that is going to be sent to the device when it adopts, and the profiles are folded down, so you can actually see what the AP is going to get.
Pay close attention to the last block of configuration which will be the device itself, and particularly interface ge1 and vlan 1 configuration, then compare it with the configuration going out to the 7532s using the same command. I suspect that something may have been modified in the 7131's profile hence the breakage you're experiencing.