[Samba] Mac can't connect to debian after upgrade to Samba 3.0.23

[Ron]

After upgrading my Debian box to Samba 3.0.23, I'm no longer able to 
connect to it from my Mac OS X 3.9 machine. I can still connect from the 
linux box TO the mac, but not the other way around. I need to be able to 
mount the linux volume on the mac. I've had to downgrade to samba 3.0.22 
on linux to get it to work. My home network is a simple 2 machine setup 
with a wired connection. My smb.conf file on the linux machine looks 
like this:

[global]
security = share
restrict anonymous = no
domain master = no
preferred master = no

max protocol = NT
ldap ssl = No
server signing = Auto

acl compatibility = winnt
workgroup = MSHOME

[music]
case sensitive = no
guest ok = yes
msdfs proxy = no
read only = no
path = /media/hdb5/music/
force group = mshome
strict locking = no

[HDB5]
path = /media/hdb5/
guest ok = yes
read only = no
hide files = System Volume Information/
case sensitive = no
msdfs proxy = no
force group = mshome
strict locking = no

[rp]
path = /home/rp/
guest ok = yes
read only = no
case sensitive = no
msdfs proxy = no
force user = rp
strict locking = no
*****************************************************

The mac is running OSX 3.9 . The file /private/etc/smb.conf looks like this:

;[public]
;path = /tmp
;public = yes
;only guest = yes
;writable = yes
;printable = no
 
 
[printers]
path = /tmp
printable = yes
 
 
[Shared]
path = /Users/rp/Shared
read only = No
inherit permissions = No
guest ok = Yes
;Created by SharePoints
 
 
[User_Share]
path = /Users/Shared
read only = No
inherit permissions = No
guest ok = Yes
;Created by SharePoints}
**********************************************
I've googled this issue and asked on both mac and my linux distro forum. 
Anyone know what's causing this?

Thank you,
Ron