Network: cable modem, Linksys wrt54gs, 2 wre54g and wusb54gc in desktop, XP/SP3, DHCP from wrt54gs. User recieved duplicate IP conflict errors on all Windows systems (3), none on a MAC PC. MAC is direct wired to the AP. All other PCs are wireless. Pings and ARP tables show no duplicate IPs. Changed the SSID and channel, removed all but one XP system, the wrt54gs, one wre54g and my test PC with a static IP outside of the DHCP scope. Same error. Changed PC to new static IP, verified not in use first, same error. Tried another static IP, same error. Turned off DHCP on wrt54gs, used only static IPS, same error. Flashed all linksys HW to latest firmware, same error. The Event log shows the conflicting system to be the same PC, conflicts with itself. Is this whole mess from the range extenders? Only one on at this point, changed the IP of the second wre54g, both were still at default when I started. Rebooted everything, cable modem to PC, same error. What's the solution here?