Isuzu D-Max: Any known issues with driveline or driveshaft?

Can you advise if you are aware of any issue to the driveline or driveshaft in Isuzu D-Max 4x4 vehicles? I purchased mine in December 2012 and at around the 30,000km mark I started to hear a knock when coming to a halt and moving off. Isuzu Australia has advised that this is a characteristic of the vehicle and not a defect. I am aware that my servicing dealer has four other vehicles with the same issue. It is now 12 months since this has occurred and Isuzu appear to be unwilling to rectify the issues.