+1 for Furry's answer. I am just bored. Heh
Think of a Mac as a fingerprint for that device. I wonder if maybe with that firmware there was some bug with the DHCP that it was only used the cloned mac on boot and not on renewing the DHCP lease. It see, like a coinsidence that your uptime would be the max IP lease time. Either way..fixed now. Woot!
PS. Furry, spend some time on the Sony Forums. Even when paid, most mods have a serious ego issue. Then again, a person's personality is usually a product of their enviroment. Garbage in=garbage out.