Interesting, which Power Mac? PPC601, PPC603e (e.g. PM4400 ;-) ), PPC604(e), G3, G4 or G5? So, you have Netatalk 2.3.1 running on your NAS, mounting a server called nas-afp, which connects to your PM & iMac G3 over wired Ethernet (or Airport?) & can be seen by a conventional MacBook network stack that doesn't have Netatalk running?