AFP and CPU Saturation

I am witnessing two problems and I am not sure if they are connected to one another. I am running a pretty standard setup: 1- 10.2.6 Server (Parent) 3- 10.2.6 Servers (Child) RAID 5 Towers connected wide Ultra SCSI (Users Home directories reside on these towers) 300 10.2.6 Clients (2000 User Accts) 100MB to the desktop Each students home directory (20mb) is mounted remotely and the client is managed with WGM. Students are using mostly Safari and Office and we are seeing very sporadic log-in times. (20s-5min) When and if the students get connected to the server, I am seeing the CPU on the child servers pegged at about 60-85%. Checking processes I can see that it is strictly AFP that is utilitizing the CPU. Again, the only applications being used are Safari and MS Office. Should I pushing the Safari cache to the local HD? As you can imagine, our iBook carts that are connecting via Airport take even longer to log-in. One last thing, I do have DNS configured.