Comment 2 for bug 214789

I solved the problem by deleting all entry's relating to older NIC in
/etc/udev/rules.d/70-persistent-net.rules

# PCI device 0x10b7:0x9050 (3c59x)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:60:97:2c:e8:f4", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

Then rebooting my machine

Then changing .........NAME="eth3" to ...........NAME="eth0" in
/etc/udev/rules.d/70-persistent-net.rules

for some reason it keeps counting up, eth5 eth6 etc

another thing i've noticed in Ubuntu 8.04 in /etc/network/interfaces
................................................
auto lo eth0 eth1
iface lo inet loopback

# The primary network interface
iface eth0 inet dhcp
..............................................

In the first line above you need to add "eth0 eth1"
in previous versions you only needed "auto lo"