Accenture to unveil blockchain editing technique

I read about this this morning in the Financial Times. Apparently Accenture is releasing this today. Although it looks like Bitcoin is safe and this is going to only work on a proprietary blockchain for the financial industry I'm concerned there might be something in their "chameleon hash" technology that could threaten the immutably of Bitcoin. Does anyone want to provide additional information about the threat if there is one?

excerpt from article.
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Richard Lumb, global head of financial services at Accenture, told the Financial Times that financial institutions and regulators would need a means to quickly correct errors on the blockchain before using it in securities markets. He gave the example of a “fat finger” trading error, or a trade assigned to the wrong counterparty.
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