Before this patch: root@57:~/iftop-1.0pre4# ./iftop interface: eth0 IP address is: 192.168.1.57 MAC address is: ffffffbc:ffffffee:7b:ffffffdb:0b:ffffffd4
With this patch root@57:~/iftop-1.0pre4# ./iftop interface: eth0 IP address is: 192.168.1.57 MAC address is: bc:ee:7b:db:0b:d4