Cross-sharing 10.4.7 or 10.4.8 freeze

I have a client with two MDD 867 DP G4’s running 10.4.8 after a Combo update performed today. I can plug my PBook (Al 1.5 GHz on 10.4.7) into one and share to it. Then I share back from the G4 to my PBook. No problems. Files browsable and readable by both. Then I disconnected, switched cables, and logged into the other G4 and got instant freeze (the same problem they experience when connected to their network). ~7 minutes after disconnecting my PBook, I get a response from my system and the BBOD goes away. The MDD in question has already been restarted because the user needed to get some work done.

This has been a problem for at least a year and I’ve not been able to fix it across Archive & Installs, or Combo updates. So, it’s not the network (directly connected using my ethernet cable), and it’s not affected by Combo updates since it’s ocurred since I migrated them to 10.4.2 from 10.2.8. I’m certain that I’ve run Tiger Cache Cleaner at some point, though at what level I don’t recall.

What can I do here? Any help is appreciated, and don’t assume that I’ve done anything else. I’m a complete network amateur. Though it sounds like it’s something in the User account, I’m just not sure. They would love to get this resolved because they don’t have the funds for a server and they need to transfer files frequently.

Thanks for reading.

Matthew