I setup a PDC with samba 3.0.23c on centos4.4 with openldap2.3-2.3.34-3.rhel4
Everything works as normal except users cannot change her passwords. (with Alt-Del-Ctrl or at logon with sambaPwdMustChange option)
I get the msg "The password on this account cannot be changed at this time."
and at this time i see this from smbd -i -d4: user evivas cannot change password now, must wait until Thu, 03 May 2007 11:56:29 EEST
I have set the minimum password age to '0'
please reopen if you still see the issue with a recent samba version.