On 64 bit archs the location of system libraries is not always /lib, so the lines referring to libraries in pam conf should not include the directory tree.
Created attachment 66216 [details, diff] ldap-howto.xml patch libs location in pam.d/system-auth left implicit: it is in ldconfig's path
doc/en/openafs.xml is affected as well
In CVS, thanks, and sorry for delay. Stuff has changed since August so I had to re-do the patch, please check the fix.