pam_unix: password changing time

[Matthias Faulstich <faulstich@fh-swf.de>]

Hello!

Since a new server-installation, for which I used a numer of configuration 
files from an older server, there are messages like this in 
/var/log/auth.log :

Jul 11 06:25:01 area51 su[7884]: (pam_unix) account nobody has password 
changed in future

stat for /etc/passwd, /etc/passwd-, /etc/shadow and etc/shadow- returns 
correct timestamps in the past.

Does anybody know, where the timestamp for a password changing is located and 
how to change it?


Kind Regards
Matthias Faulstich