Also see http://www.consumeraffairs.govt.nz/consumerinfo/cga/faultygoods.html
The differences in responsibility between manufacturer and retailer referred to by the OP from the Herald article are set out quite well by Consumer here
ahmad: At the end of the day the OP claims a consensus when there wasn't one, and neither the manufacturer nor the retailer appear to be unreasonable..
Byrned: From what I remember of the CGA is that it is between the consumer and the retailer. The manufacturer has no obligations under it. However they do have obligations under the Fair Trading Act, which is why they will mostly be helpful.
dickytim: as I said earlier, I found 1-day very good to deal with, is this unit parallel imported as far as you know?
My phone definately was.
Remember if this item was parallel imported JC Matthew has no obligation to you.
dickytim: We have the same arguement here at work, we never try and get out or our responsibilities but with our product 90% of faults are caused by inproper installation