Description of problem:
When doing a 'yum update' I get problems between an installed x86_64 package 
and the i386 package. 

Version-Release number of selected component (if applicable):
xulrunner-1.9-1.fc9.x86_64 and xulrunner-1.9-0.60.beta5.fc9.i386

How reproducible:
'yum update xulrunner' in a x86_64 machine.

Steps to Reproduce:
1. yum update xulrunner
2.
3.
  
Actual results:
Setting up Update Process
Resolving Dependencies
--> Running transaction check
--> Processing Dependency: gecko-libs = 1.9 for package: nspluginwrapper
--> Processing Dependency: gecko-libs = 1.9 for package: totem-mozplugin
--> Processing Dependency: gecko-libs = 1.9 for package: nspluginwrapper
---> Package xulrunner.x86_64 0:1.9.0.1-1.fc9 set to be updated
--> Running transaction check
---> Package xulrunner.i386 0:1.9-0.60.beta5.fc9 set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Updating:
 xulrunner               x86_64     1.9.0.1-1.fc9    updates           8.7 M
Installing for dependencies:
 xulrunner               i386       1.9-0.60.beta5.fc9  fedora            8.9 M

Transaction Summary
=============================================================================
Install      1 Package(s)
Update       1 Package(s)
Remove       0 Package(s)

Total size: 18 M
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test


Transaction Check Error:
  package xulrunner-1.9-1.fc9.x86_64 (which is newer than 
xulrunner-1.9-0.60.beta5.fc9.i386) is already installed

Expected results:
xulrunner should update without problems

Additional info: