I have the B1 Version with firmware 2.02NA.  I am trying to reserve an address for a Realtek Wireless RTL8191SE card with a MAC address that starts like this: 70:**:**:**:**:**.  Since it doesn't start with two zeros I can't do it.  I saw on another Dlink router forum that this bug existed there too but was corrected.  Please add this to the list of things to be addressed.  Thanks!