samba - May 2006 - domain name vs ip address causes refresh problem and lowercase vs capitol folder names - how to fix refresh issue?

I have Samba 3.022 and have run into a curious problem - when I access my
shared folders over the internet using Windows XP, I get different behavior
whether I put the domain name (e.g. \\mydomain.com) versus if I put my
direct ip address in (e.g. \\12.34.56.78) when accessing my shares.

First, the first screen listing all the shares is in all caps when using the
domain name but in lowercase when using the ip address.  No big deal here, I
don't really care but it's curious.

But the real problem is with refreshing the directories after making any
changes when using the domain name.  If I rename or move a folder, it will
not be refreshed unless I hit F5.  This is not a problem when using the IP
address directly.

So I can just use the IP directly for now, but I am trying to debug the
problem because my IP isn't static and it would be nice to have access using
the domain name.  I've fiddled with options such as dns proxy = yes and
such, but nothing seems to have made a different.  Any advice would be much
appreciated.  I included my smb.conf file below.

Thanks very much in advance!
jet
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[global]
workgroup = Workgroup
server string = %h server (Samba, Ubuntu)
dns proxy = no

log file = /var/log/samba/log.%m
max log size = 1000
syslog = 0

panic action = /usr/share/samba/panic-action %d

hosts allow = ALL

####### Authentication #######

security = user username map = /etc/samba/smbusers

encrypt passwords = true
passdb backend = tdbsam guest

obey pam restrictions = yes

guest account = nobody
invalid users = root


passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\sUNIX\spassword:* %n\n *Retype\snew\sUNIX\spassword:*
%n\n .

socket options = IPTOS_THROUGHPUT SO_KEEPALIVE

#======================= Share Definitions ======================
create mask = 0770
directory mask = 0770

[printers]
comment = All Printers
browseable = no
path = /tmp
printable = yes
create mask = 0700

[print$]
comment = Printer Drivers
path = /var/lib/samba/printers


[PROGS]
path = /home/jet/progs
case sensitive = no
read only = no
vfs objects = recycle

[SHARED]
path = /home/jet/Shared
case sensitive = no
read only = no
vfs objects = recycle

[MOVIES]
path = /home/jet/Desktop/Movies/
case sensitive = no
read only = no
vfs objects = recycle

[FTP]
path = /home/jet/ftp/
case sensitive = no
read only = no
vfs objects = recycle

[CDROMDVD]
path = /media/cdrom0/
case sensitive = no

[FUNNY SHIT]
path = /home/jet/Funny Shit/
case sensitive = no
read only = no
vfs objects = recycle

[LAPPY_SHARED]
path = /home/jet/Desktop/Lappy_shared/
case sensitive = no
read only = no
vfs objects = recycle