Not changing my tune at all. The spouse of a president or any other relation has no business (which means inappropriate) speaking on public policy.
Family members generally aren't trained politicians and therefore are prone to put their foot in their mouth when it comes time to answer questions from the press.
Laura Bush showed this as she indicated that there was a possibility that those opposed to Miers were doing so for sexist reasons.
A presidential spouse speaking on public policy is always inappropriate - it's just that sometimes it's not that big of a deal. If the CEO of a public company sent his wife out to do his work then he'd be replaced real quick.
I know that Laura Bush isn't the first to do it, but that doesn't make it right.
Oh, so now it's not "in most cases" anymore?
Now you're back to saying Laura Bush shouldn't speak out on public policy period.