All of a sudden, lots of my Domino TDP node passwords are expiring.

Considering that:

1.  I am running with PASSWORDACCESS GENERATE and there is a TSM.PWD file
in the approriate domdsmc directory
2,  The server password EXPIRATION is 90-days and these systems have not
been running that long
3.  There is no value set for password expiration on the client node
definition
4.  Nothing has changed - either server or client wise.  These backups run
every day !

What gives ?

Server=TSM AIX 5.3.1.2
Client=Solaris 5.3.1.x
TDP=5.3.0.0