I have read on a few sites that the 4-bolt stems are a big no-no with carbon bars due to possible bar damage. I don't get it. If you install it properly, it should provide a wider area of support to prevent possible damage. I would like to use a 4-bolt stem if it's ok.

I have noticed some stores sell carbon bars/4-bolt stem combos.

What exactly am I missing here? Is it really that big of a deal?