Description of problem:
I got the following message after doing yum install -y firefox:

[root@bruno bruno]# yum install -y firefox
Loaded plugins: aliases, changelog, downloadonly, keys, list-data, merge-conf,
              : post-transaction-actions, priorities, protectbase, remove-with-
              : leaves, rpm-warm-cache, show-leaves, tmprepo, tsflags, verify,
              : versionlock
Setting up Install Process
0 packages excluded due to repository protections
Resolving Dependencies
--> Running transaction check
---> Package firefox.i686 0:11.0-1.fc18 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package           Arch           Version               Repository         Size
================================================================================
Installing:
 firefox           i686           11.0-1.fc18           rawhide            20 M

Transaction Summary
================================================================================
Install  1 Package

Total download size: 20 M
Installed size: 24 M
Downloading Packages:
Running Transaction Check
ERROR with transaction check vs depsolve:
gecko-libs(x86-32) = 11.0-3-1 is needed by firefox-11.0-1.fc18.i686
Please report this error in https://bugzilla.redhat.com/enter_bug.cgi?product=Fedora&version=rawhide&component=yum
 You could try running: rpm -Va --nofiles --nodigest
Your transaction was saved, rerun it with:
 yum load-transaction /tmp/yum_save_tx.2012-03-15.11-38.sWJ3wh.yumtx


Version-Release number of selected component (if applicable):
yum-3.4.3-22.fc18.noarch

How reproducible:
Seems to happen 100% of the time updating to or installing firefox.i686 0:11.0-1.fc18 on my machine, though it's likely an i686 specific issue given the error message.

Steps to Reproduce:
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Actual results:


Expected results:


Additional info: