%{_host} different in FC and FE build environments

[Rex Dieter]

>> The problem being is that %{_host) is based on the build host, not the
>> target arch/platform.  Any variant in buildhost will exhibit the problem
>> you're seeing.  The bug is in gtk2, IMO.
> 
> Aha. But I don't see a good strategy for fixing this in FC4/FE4 and
> FC5/FE5 without breaking things. So we need a hot fix somewhere. Where
> should that hotfix happen then?

As I said, the fix (IMO) needs to be in gtk2, see existing bugzilla 
reports on this same issue:
http://bugzilla.redhat.com/bugzilla/143950
http://bugzilla.redhat.com/bugzilla/143547

-- Rex