Alan, yes, but I have to say - I'm not convinced there is anything that necessarily needs to be "remedied". When I said it perhaps opens a very interesting case study I meant exactly that. I don't know whether there really are internationally applicable rules - say in an ITO context - against technological segmentation of markets in the manner that it is alleged to be happening. If there are none, the company is within its rights. If there are some, perhaps they could be challenged, but it would be hugely expensive with an uncertain outcome. And that said, I also believe there are distinctions between what private companies are not allowed to do, versus what governments are not allowed to do.
I do think it completely reasonable to expect that the costs of doing business in different markets are very different for all kinds of reasons, therefore companies doing business in many markets need many different pricing structures to recover their costs in each one of them, if that is their business model. For others, the business model could be to reduce international price differences by cross-subsidizing between markets in a manner that allows them to recover their costs on a broad corporate basis - but who knows - perhaps that could get them into legal trouble too. In the former model the company may need other measures (such as that alleged in this thread) to make those differentials stick, while in the latter much less so.
In the USA you have market size playing to your advantage - you get scale economies allowing comparatively low prices and full-blown service/support - a win-win. In countries like Canada and Australia we don't have that luxury. We are faced with the inevitable need to pay more if we want the company to sustain the kind of service infrastructure locally that you have in the USA. Between Canada and the USA, in an effort to maintain roughly comparable pricing on a landed, exchange-weighted basis, Epson has achieved a careful balance between what they support in Canada versus what is only supported to Canada from their US HQ. Maybe it's much harder for them do this vis a vis Australia which is a wee bit further afield.