Description of problem:
When trying to perform yum update, yum reports some error in the PREIN scriptlett.



Version-Release number of selected component (if applicable):
from netsniff-ng-0.5.6-2.fc17.x86_64
to   netsniff-ng-0.5.7-1.fc17.x86_64

How reproducible:
100%

Steps to Reproduce:
1. install version netsniff-ng-0.5.6-2.fc17.x86_64
2. yum -y update
3. see the error
  
Actual results:
Resolving Dependencies
--> Running transaction check
---> Package netsniff-ng.x86_64 0:0.5.6-2.fc17 will be updated
---> Package netsniff-ng.x86_64 0:0.5.7-1.fc17 will be an update
--> Finished Dependency Resolution

Dependencies Resolved

====================================================================================================================================================================================
 Package                                      Arch                                    Version                                        Repository                                Size
====================================================================================================================================================================================
Updating:
 netsniff-ng                                  x86_64                                  0.5.7-1.fc17                                   updates                                  297 k

Transaction Summary
====================================================================================================================================================================================
Upgrade  1 Package

Total download size: 297 k
Downloading Packages:
Setting up and reading Presto delta metadata
netsniff-ng-0.5.7-1.fc17.x86_64.rpm                                                                                                                          | 297 kB     00:00     
Running Transaction Check
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Error in PREIN scriptlet in rpm package netsniff-ng-0.5.7-1.fc17.x86_64
error reading information on service netsniff-ng: No such file or directory
error: %pre(netsniff-ng-0.5.7-1.fc17.x86_64) scriptlet failed, exit status 1
netsniff-ng-0.5.6-2.fc17.x86_64 was supposed to be removed but is not!
  Verifying  : netsniff-ng-0.5.6-2.fc17.x86_64                                                                                                                                  1/2 
  Verifying  : netsniff-ng-0.5.7-1.fc17.x86_64                                                                                                                                  2/2 

Failed:
  netsniff-ng.x86_64 0:0.5.6-2.fc17                                                        netsniff-ng.x86_64 0:0.5.7-1.fc17                           

Expected results:
It is expected to upgrade to 0.5.7-1