The networking start script tries to start up networking as per the configuration in /etc/network/interfaces. This file tries to bring up eth0, eth1, eth2, ath0 and wlan0 using DHCP. Any of those interfaces that dont exist in your system will generate the "No such device" error. That is normal. You can comment out the configuration lines for any interfaces you dont have if it bothers you.
Running ifconfig after "networking start" will show you which interfaces are operational.
Check out these from the FAQ forum if you havent already: