Samba broken in upgrade from 12 to 14 LTS

[snash]

I did the fully upgrade from 12 LTS to 14.04.1 LTS
Samba worked before. Doesn't start now.
This is a simple family shared file server.

Nothing I do in the smb.conf seems to make any improvement.
The Samba troubleshooting guide has no help on getting the daemon started.
As of now....

testparm works:
snash@NashFS:/etc/samba$ testparm smb.conf
Load smb config files from smb.conf
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
Processing section "[Storage]"
Processing section "[2TB]"
Loaded services file OK.
Server role: ROLE_STANDALONE
Press enter to see a dump of your service definitions


smbd is not starting (no process)
nmbd process has started

/var/log/samba/log.smbd contains:


[2014/09/04 15:55:03, 0] ../source3/smbd/server.c:1198(main)
smbd version 4.1.6-Ubuntu started.
Copyright Andrew Tridgell and the Samba Team 1992-2013
[2014/09/04 15:55:03.392012, 0] ../source3/smbd/server.c:1278(main)
standard input is not a socket, assuming -D option
[2014/09/04 15:55:03.399648, 0] ../source3/auth/auth_util.c:866(make_new_session_info_guest)
make_server_info_info3 failed with NT_STATUS_NO_SUCH_USER
[2014/09/04 15:55:03.399907, 0] ../source3/smbd/server.c:1448(main)
ERROR: failed to setup guest info.


Your suggestions would be much appreciated.

=============================
smb.conf

[global]
security = user
map to guest = Bad User
workgroup = NASH
log file = /var/log/samba/log.%m
max log size = 1000
#
# encrypt passwords = yes
encrypt passwords = no
#
server string = %h (Samba, Ubuntu)
default = Storage
load printers = no
netbios name = NashFS
# usershare allow guests = yes
# wins support = yes
guest account = Family
hosts allow = 10.42.42.

[Storage]
browseable = yes
writeable = yes
delete readonly = yes
path = /Storage
force group = sambashare
force user = Family
comment = Storage for Windows
public = yes
available = yes

[2TB]
comment = Disk space with no mirror
path = /2TB
browseable = yes
writeable = yes
delete readonly = yes
force group = sambashare
force user = Family
public = yes
available = yes
=======================================

[snash]

SOLVED
The offend term is:
guest account = Family
I have had this term in for at least three years. I have no idea why it broke in this upgrade.
If have also done a clean reinstall of samba, but that may have made no difference.
I can break it at will by uncommenting the offending term.

My operational config now looks like this:
# /etc/samba/smb.conf
#
# Worked 140905 after Ubuntu upgrade to 14.04.1 LTS
#======================= Global Settings =======================

[global]
map to guest = Bad User
workgroup = NASH
log file = /var/log/samba/log.%m
max log size = 1000
server string = %h (Samba, Ubuntu)
default = Storage
load printers = no
wins support = yes
hosts allow = 10.42.42.
# Causes failure
# guest account = Family

[Storage]
browseable = yes
writeable = yes
delete readonly = yes
path = /Storage
force group = sambashare
force user = Family
comment = Storage for Windows
public = yes
available = yes


[2TB]
comment = Disk space with no mirror
path = /2TB
browseable = yes
writeable = yes
delete readonly = yes
force group = sambashare
force user = Family
public = yes
available = yes