pam update and /etc/pam.d/system-auth question

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   Stock fc6 install - after an update of pam I now have in /etc/pam.d:

4 lrwxrwxrwx 1 root root  14 Nov  4 12:32 system-auth -> system-auth-ac
8 -rw-r--r-- 1 root root 844 Nov  4 12:32 system-auth-ac
4 -rw-r--r-- 1 root root 683 Dec 22 16:49 system-auth.rpmnew

Should system-auth.rpmnew have replaced system-auth-ac or not?
The changelog does not clarify this for me...

thanks.

g/