I am configuring my 1600n via DHCP. Initially that was fine and it was set to 192.168.0.107. I subsequently bound the IP 192.168.0.110 to the printer's MAC address in my router's administration screen (it is a Netgear FVS318 and this feature is called Host IP). I used the Windows-based IP setting utility to refresh the printer's IP address and was quite surprised when it was set to 169.254.90.121 with a subnet mask of 255.255.0.0.

Resetting the NIC (via the menu on the printer) and rebooting had no effect and my only resolution so far has been to statically set the IP address to 192.168.0.110.

Incidentally, the Host IP feature on the router works for all my other network devices whose IP address I want to bind to their respective MAC addresses.