Updating jetty causes a number of rpmnew files to be created even if I haven't edited these files
Log:

Loaded plugins: langpacks, presto, refresh-packagekit
rawhide/metalink                                                                                                                                                                                              |  13 kB     00:00     
rawhide                                                                                                                                                                                                       | 4.2 kB     00:00     
rawhide/primary_db                                                                                                                                                                                            |  14 MB     00:22     
rawhide/group_gz                                                                                                                                                                                              | 425 kB     00:01     
Setting up Update Process
Resolving Dependencies
--> Running transaction check
---> Package jetty.noarch 0:8.1.0-0.3.rc5.fc17 will be updated
---> Package jetty.noarch 0:8.1.0-1.fc17 will be an update
--> Finished Dependency Resolution

Dependencies Resolved

=====================================================================================================================================================================================================================================
 Package                                              Arch                                                  Version                                                     Repository                                              Size
=====================================================================================================================================================================================================================================
Updating:
 jetty                                                noarch                                                8.1.0-1.fc17                                                rawhide                                                3.6 M

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

Total download size: 3.6 M
Is this ok [y/N]: y
Downloading Packages:
Setting up and reading Presto delta metadata
rawhide/prestodelta                                                                                                                                                                                           | 2.8 MB     00:07     
Processing delta metadata
Package(s) data still to download: 3.6 M
jetty-8.1.0-1.fc17.noarch.rpm                                                                                                                                                                                 | 3.6 MB     00:10     
Running Transaction Check
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Updating   : jetty-8.1.0-1.fc17.noarch                                                                                                                                                                                         1/2 
/var/tmp/rpm-tmp.vvsDcE: line 2: fg: no job control
/var/tmp/rpm-tmp.vvsDcE: line 4: fg: no job control
warning: /etc/jetty/contexts created as /etc/jetty/contexts.rpmnew
warning: /etc/jetty/contexts-available created as /etc/jetty/contexts-available.rpmnew
warning: /etc/jetty/resources created as /etc/jetty/resources.rpmnew
  Cleanup    : jetty-8.1.0-0.3.rc5.fc17.noarch