Description of problem:
I can't install evolution-spamassassin using gnome-packagekit, but 'yum install evolution-spamassassin' would do it without problems.

Version-Release number of selected component (if applicable):
gnome-packagekit-2.91.92-2.fc15.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Install evolution and spamassassin, but remove evolution-spamassassin if installed
2.Activities -> Applications -> Add/Remove Software
3.Perform a by-name search for evolution-spamassassin
4.Select that package for installation and click Apply.

Actual results:
A dialog appears:

==>
Transaction error

An unspecified transaction error has occurred.
More information is available in the detailed report.

More details
Protected multilib versions:
evolution-2.91.92-1.fc15.i686 !
=
evolution-2.91.92-2.fc15.x86_64
<==

Additional info:

[root@worm ~]# yum install evolution-spamassassin
Loaded plugins: langpacks, presto, refresh-packagekit
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package evolution-spamassassin.x86_64 0:2.91.92-2.fc15 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package                     Arch        Version              Repository   Size
================================================================================
Installing:
 evolution-spamassassin      x86_64      2.91.92-2.fc15       fedora       94 k

Transaction Summary
================================================================================
Install       1 Package(s)

Total download size: 94 k
Installed size: 30 k
Is this ok [y/N]: y
Downloading Packages:
Setting up and reading Presto delta metadata
Processing delta metadata
Package(s) data still to download: 94 k
evolution-spamassassin-2.91.92-2.fc15.x86_64.rpm         |  94 kB     00:00     
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : evolution-spamassassin-2.91.92-2.fc15.x86_64                 1/1 

Installed:
  evolution-spamassassin.x86_64 0:2.91.92-2.fc15                                

Complete!