Samba share assess w/no authentication

RH 6.4 Samba 3.5.10. Joined a Windows AD (net rpc)
I'm trying to create a public read-only share but regardless of the options I've tried users get prompted for a user/password.
Can someone tell me whats wrong with my setup? I'm trying to make a whole filesystem that will contain installation media available to anyone to get/execute for installs.

I've setup SeLinux option

[root@arc ~]# ls -ldZ /fs_apprepo
drwxrwxrwx. root root system_u:object_r:samba_share_t:s0 /fs_apprepo

Below is my smb.conf.
Note I also have other restricted shares and well and they work as intended.

[global]
    workgroup = DEVENG
    server string = %h Samba File Server %v
    bind interfaces only = yes
    interfaces = 127.0.0.1 10.128.34.63 
    hosts allow = 127. 10.128. 172.
    smb ports = 139 445
#---- Domain Members Options ---
    security = domain 
    passdb backend = tdbsam
    password server = *
    username map = /etc/samba/username.map
    auth methods = guest sam winbind
    guest account = nobody
    usershare allow guests = yes
#   map to guest = Bad User
    client use spnego = no
    acl allow execute always = true

    wins server = 10.xxx.xxx.xx, 172.xxx.xxx.xxx
    dns proxy = no
    deadtime = 10
#  Browser Control Options ----------------------------
    domain master = no 
    local master = no
    preferred master = no
    os level = 33

#  Filesystem Options ---------------------------
    oplocks = no
    level2 oplocks = no
    kernel oplocks = no
    strict locking = no    
    posix locking = no
    case sensitive = no
    preserve case = yes
    map archive = no
    map hidden = no
#  map read only = no
    map system = no
    store dos attributes = yes
    hide dot files = no
    follow symlinks = yes
    host msdfs = no
    create mask = 0775
    directory mask = 0755
#===== Share Definitions =========

[app_repo]
    comment = Application Media Repository
    path = /fs_apprepo
    browseable = yes
    public = yes
    guest ok = yes
#   read only = nobody
    write list = dignarn
    guest account = nobody
    guest only = yes

[neteng]
    comment = Network Engineering Share
    path = /fs_neteng
    browseable = yes
    writable = yes
#    valid users = @neteng
    valid users = angel gosse forb ramar roger smart sulli