samba - Oct 2004 - Print server shows up as IP instead of hostname after upgrade

Greetings Admins,

We upgraded samba from 3.0.4 to 3.0.7 with cups 1.1.20 to serve printing 
to XP client.  We kept the install and config of 3.0.7 exactly the same 
as 3.0.4

However, after upgrading, newly installed printers now show up as 
"<printername> on <IP>".  Previous installs showed up as
"<printername>
on <Hostname>".

Users are unable to delete their printers installed on 3.0.4

I've seen some posts on the archives:
http://marc.theaimsgroup.com/?l=samba&m=109595131710783&w=2
http://marc.theaimsgroup.com/?l=samba&m=109597205120721&w=2
http://marc.theaimsgroup.com/?l=samba&m=109595083029605&w=2

But no answers as of yet.  Does anyone know how to fix this?

thanks,
Ryan