http://www.theguardian.com/money/2014/d ... cerexpress

Does Amazon have any responsibility there other than trying to cancel the orders? Is it mostly the software company? And what about the credit card companies?

Don't see how the seller can claim from the credit card companies. All the rules regarding refunds protect the buyer, not the seller. Plus a refund would be a penny.
This is between Amazon and the sellers. No doubt Amazon will try and wriggle out of any responsibility.

I'm wondering if the credit card companies have any policies on such matters - they're providing credit cover between all the interested parties, and Amazon set about cancelling some of the orders.

At the moment it looks like the software company should take the lion's share of the blame, but I wonder where that really leaves the sellers

Not Amazon's problem if I read the story right. The suppliers were using some software that automatically reduced the price of their goods to undercut a rival - so all it needed was several sellers all selling the same item with the same undercutting software and away you go off the cliff on the price.

This was cleared up years ago, this used to happen regularly, well, prices too low to be true due to site errors or human errors. The seller can cancel the orders.

The problem seems to be that Amazon is dispatching too quickly for them to cancel the orders.

The question is, why doesn't the software that they used have a minimum price? Or why didn't the sellers use it? If it is the latter, then, although the software company has something to answer for, the shops have to take some of the liability for this.