smb.conf works in Slackware 14.0, breaks in -current

I am thinking about biting the bullet and upgrading from Slackware 14.0 to -current, but no devices on my LAN (neither Linux nor Windows not iOS) recognize my SAMBA share running -current, and all of them do recognize it running the identical smb.conf in 14.0.

I have simple needs. One share called 'PublicDirectory' mounted at /mnt/dv/public. Guests OK. read/write allowed.

Ideas appreciated.

My current smb.conf:

[global]
workgroup = HOME
server string = %h server
#security = SHARE
# Next 2 lines are a hack because SHARE security now invalid
security = USER
map to guest = Bad User
log file = /var/log/samba/log.%m
max log size = 105000
dns proxy = No
hosts allow = 192.168.8.
hosts deny = ALL
local master = yes
preferred master = yes

[PublicDirectory]
path = /mnt/dv/public
read only = No
guest ok = Yes