172.18.89.75 is in Skouperd's range, but if you look at the body of the OSPF ID in the LSA DB, it shows:
link-type=Transit id=172.18.60.33 data=172.18.60.33 metric=10
link-type=Transit id=172.18.60.1 data=172.18.60.8 metric=1
172.18.60.33 is a network range out of Jypel's /24, so we should probably have a look around there. However if you do a traceroute to it...it goes to link-moontop.jypels.ctwug.za.net. Probably where we should look for that one.
Edit: Actually all of those belong to the moontop rbs.
Edit2: Alright so 172.18.89.75 is on rb7.moontop, and should be changed to 172.18.59.8
The problem is, ctwug/ctwug works on it, but I can see radius is disabled. Someone will have to ask Moonfruit to fix.