The lack of a 32bit libnss_ldap on the x86_64 platform has caused some issues
for us.  Notably we often run a 32bit Sun JVM on the 64bit platform, as unless
we need the larger address space offered, we find it performs better than the
64bit version.

The office uses a centralized user/password database, shared via LDAP.  A 32bit
JVM attempts to obtain details such as the user's name and home directory from a
32bit libnss, and in our environment this fails without a 32bit libnss_ldap.

public class Test {
  public static void main(String[] args) {
    System.err.println(System.getProperty("user.home",""));
    System.err.println(System.getProperty("user.name",""));
  }
}

Without libnss_ldap this just returns "?" on each output line.  No doubt the
same problem will affect other 32 bit software that attempts to query the passwd
database.

Fortunately, due to Fedora's use of /lib64 for 64-bit libs, the fix is as simple
as obtaining the nss_ldap RPM from the i386 distribution of Fedora Core 6 and
installing that alongside the 64bit version.

I'm aware that there could be debate over how many 32bit libs to provide on
x86_64, but given the number of applications that are likely to expect basic
passwd database functionality to work I think that the nss_* libraries should be
included.