I had problems with pam_krb5-1-7 since installing it, it just did not work.
I reverted to an older pam_krb5 module from contrib - it worked fine (with
some necessary changes in /etc/pam.d/* files).
My machine has two network interfaces, and has been set up with several
network interface aliases (eth1:0, eth1:1, ...). I have just found that if
the number of aliases is limited to no more than 5 (eth1:0 - eth1:4)
pam_krb5-1-7 works great!