Description of problem:

nfs-utils (1.0.9-54) does not change nfsnobody's primary group from 4294967294 to 65534 when the package is upgraded on 64Bit rhel 4/5.  It changes the /etc/group entry to 65534 but does not change the user's gid in /etc/passwd.

After an upgrade to nfs-utils-1.0.9-54:
# grep nfsnobody /etc/passwd /etc/group
/etc/passwd:nfsnobody:x:65534:4294967294:Anonymous NFS User:/var/lib/nfs:/sbin/nologin
/etc/group:nfsnobody:x:65534:


From the scripts being run in the rpm:
#rpm -qa --scripts nfs-utils
... <snip>
# Using the 16-bit value of -2 for the nfsnobody uid and gid

# Create nfsnobody gid as long as it does not already exist.
cat /etc/group | cut -d':' -f 1 | grep --quiet nfsnobody 2>/dev/null
if [ "$?" -eq 1 ]; then
    /usr/sbin/groupadd -g 65534 nfsnobody 2>/dev/null || :
else
    /usr/sbin/groupmod -g 65534 nfsnobody 2>/dev/null || :
fi

# Create nfsnobody uid as long as it does not already exist.
cat /etc/passwd | cut -d':' -f 1 | grep --quiet nfsnobody 2>/dev/null
if [ "$?" -eq 1 ]; then
        /usr/sbin/useradd -l -c "Anonymous NFS User" -r -g 65534 \
                -s /sbin/nologin -u 65534 -d /var/lib/nfs nfsnobody 2>/dev/null || :
else
        /usr/sbin/usermod -u 65534 nfsnobody 2>/dev/null || :
fi
... <snip>



This correction should be made:
    /usr/sbin/usermod -u 65534 nfsnobody 2>/dev/null || :
should be changed to this
    /usr/sbin/usermod -u 65534 -g 65534 nfsnobody 2>/dev/null || :


Version-Release number of selected component (if applicable):
  on rhel 4 and 5 64Bit architectures

How reproducible:
  every time

Steps to Reproduce:
1.  Have a previous version (any prior to 1.0.9-54?) of nfs-utils installed on
    64Bit rhel 4/5 
2.  Upgrade nfs-utils
  
Actual results:
# grep nfsnobody /etc/passwd /etc/group
/etc/passwd:nfsnobody:x:65534:4294967294:Anonymous NFS User:/var/lib/nfs:/sbin/nologin
/etc/group:nfsnobody:x:65534:

Expected results:
# grep nfsnobody /etc/passwd /etc/group
/etc/passwd:nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin
/etc/group:nfsnobody:x:65534:


Additional info:
will provide if requested.