After a recent update of my dhcp3 package I could not perform dhcp requests anymore and got the following error message

wifi0: unknown hardware address type 801
Can't allocate interface atlease {
interface .
Failed to bring up ath0.

The problem was with changes due to the upgrade in the following file


It added this line which broke the dhcp provess.

interface "atlease {

Remove this line and you should be fine.