Samba y permisos de escritura

[samsaga2]

Me estoy volviendo jilipollas con la cantidad de vueltas que le estoy
dando al tema. Tengo una carpeta compartida con samba (/var/www) pero
el problema es que me la comparte como solo lectura a pesar de tener
writable = yes y de que los permisos de los directorios son correctos.
Seria de agradecer una ayudita. Copy&paste la configuracion del samba:

[global]
        security = share
        share modes = yes
        log file = /var/log/samba/log.%m
        passwd chat = *Enter\snew\sUNIX\spassword:* %n\n
*Retype\snew\sUNIX\spassword:* %n\n .
        socket options = TCP_NODELAY
        obey pam restrictions = yes
        encrypt passwords = true
        passdb backend = tdbsam guest
        passwd program = /usr/bin/passwd %u
        dns proxy = no
        netbios name = correu2
        server string = %h server (Samba, Ubuntu)
        invalid users = root
        workgroup = einescanela
        os level = 20
        syslog = 0
        panic action = /usr/share/samba/panic-action %d
        max log size = 1000

[homes]
   comment = Home Directories
   browseable = no
   writable = yes
   create mask = 0700
   directory mask = 0700

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

[webs]
        path = /var/www
        public = yes
        writable = yes
        create mask = 0700
        directory mask = 0700
        force user = www-data
        force group = www-data
        default user = www-data