[Samba] Password Chat/Sync problems with 3.0.23

[Rob Mason]

Hi,

Following an upgrade to 3.0.23, it appears that my UNIX password 
sync/chat is no longer working (although I can't confirm it wasn't 
broken in 3.0.21, it was working before).  The XP clients throw up a "no 
permission to change password" error when the users attempt to renew 
passwords.  I've carefully checked my password chat script and it 
appears to be OK.  The logs files show:

<snip>
.
[2006/08/11 12:26:14, 3] smbd/chgpasswd.c:chgpasswd(462)
  chgpasswd: Password change (as_root=Yes) for user: tester
[2006/08/11 12:26:14, 3] smbd/chgpasswd.c:findpty(105)
  pty: try to open ptyp0, line was /dev/ptyXX
[2006/08/11 12:26:14, 3] smbd/chgpasswd.c:findpty(105)
  pty: try to open ptyp1, line was /dev/ptyp0
[2006/08/11 12:26:14, 3] smbd/chgpasswd.c:chat_with_program(351)
  chat_with_program: Cannot Allocate pty for password change: tester
.
</snip>

relevant portion of smb.conf is:

<snip>
        passdb backend = tdbsam
        passwd program = /root/smbpass.sh %u
        passwd chat = *Password* %n\n *Password* %n\n *Changed* %n\n
        passwd chat debug = yes
        unix password sync = Yes
        username map = /usr/local/etc/samba/smbusers
</snip>

I've tried to simplify my password chat script to the simplest possible 
variation for test purposes:

#!/bin/sh
/usr/bin/passwd -l $1
echo "Password Changed"

Thanks in advance...

Rob