serial number format in dynamic dns update

[Norman Zhang]

>RFC suggests that serial number in SOA, should be in
>the format of YYYYMMDDnn. 
>
>How dyn.dns updates the serial number using this
>format? 
>
>What is the next serial number using dyndns update, if
>the current serial number is '2004103199'?

I'm not sure if this has been discussed, Verisign is pushing for a new 
format.

http://www.verisign.com/products-services/naming-and-directory-services/naming-services/page_005513.html

In bind 9.2.3 and dhcp 3.0.1, I can only use yyyymmdd format. Is this by 
design?

Regards,
Norman