[Repost] What is "Error: Protected multilib versions"

[John Reiser]

>> # yum install /usr/sbin/libvirtd

>> Error: Protected multilib versions: libvirt-client-0.9.10-2.fc17.i686 != libvirt-client-0.9.10-3.fc17.x86_64

>> What does the error mean?
> ...

Or, some packager forgot to use %{?_isa} when specifying package dependencies
which are [or become] architecture-dependent.  This is a common and *systematic*
error which causes much grief.  None of the tools check for it, which is another
bug^W"opportunity for enhancement".

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