Hi stockduck:
This is not because of CTM, but because of the internal mechanism of Active Directory. You can get more details about it from MicroSoft:
http://support.microsoft.com/kb/154501/en-us/And how to avoid this problem? In short, here is the entry for each of the workstations:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters]
"DisablePasswordChange"=dword:00000001