I got

# yum -y update
...
 krb5-devel              x86_64     1.6.1-2.1.fc7    updates           1.1 M
 krb5-devel              i386       1.6.1-2.1.fc7    updates           1.1 M
 krb5-libs               i386       1.6.1-2.1.fc7    updates           646 k
 krb5-libs               x86_64     1.6.1-2.1.fc7    updates           657 k
 krb5-workstation        x86_64     1.6.1-2.1.fc7    updates           451 k
...
  Updating  : krb5-libs                                            [
7/77]warning: /etc/krb5.conf created as /etc/krb5.conf.rpmnew
...
  Updating  : krb5-devel                                          
[29/77]warning: /etc/profile.d/krb5-devel.csh created as
/etc/profile.d/krb5-devel.csh.rpmnew
warning: /etc/profile.d/krb5-devel.sh created as /etc/profile.d/krb5-devel.sh.rpmnew

But those .rpmnew files are the same as the originals:

[root@video etc]# diff -up /etc/krb5.conf.rpmnew /etc/krb5.conf
[root@video etc]# diff -up /etc/profile.d/krb5-devel.sh.rpmnew
/etc/profile.d/krb5-devel.sh 
[root@video etc]# diff -up /etc/profile.d/krb5-devel.csh.rpmnew
/etc/profile.d/krb5-devel.csh 
[root@video etc]#