Ironically, with the Samsung Galaxy S III, it is the white version that is not affected by the manufacturing problem. Does it really matter to buyers of the Samsung Galaxy S III which color they buy? Would you change your pre-order to a white model from a blue one if it meant getting the phone earlier? Obviously it meant something to Samsung to make sure that their new flagship phone was launched without a blemish because destroying 600,000 already manufactured back covers doesn't come cheaply. Then, there is the cost to run off another 600,000 replacement covers. But it had to done because if there is one thing that you can't put a price on, it's a company's reputation.
source: mobilebulgaria.com (translated) via Phandroid
White blotches on the back cover of the pebble blue Samsung Galaxy S III were behind the destruction of 600,000 back covers and a delay in the launch of the model