[CentOS] PAM_shield locking me out?

Tue Aug 24 15:29:19 UTC 2010
Rob Kampen <rkampen at kampensonline.com>

Yesterday I installed pam_shield and followed the testing suggested and 
thought all was well.
today I find that I cannot get to my email account, I can login via ssh 
okay (uses keys) but su and sudo give
segmentation faults. I am guessing due to the pam module causing a problem.
As I cannot do remote login as root and sudo and su use pam I appear to 
have locked myself out.
Any words of wisdom from those a little more knowledgeable?
Why do I keep trying new things - I like to improve my system and harden 
it against constant script kiddies (many different triers per day), but 
despite reading all the instructions I fall into a hole I cannot climb 
out of.
Hopefully someone has an idea
BTW - the console also fails to allow login
TIA Rob

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