Samsung have had to recall about 2.8 million top loader washing machines in the US. This does not affect Australian sold machines according to Samsung (see: http://www.samsung.com/au/washingmachinerecall/Australian-top-loader-washing-machines-not-affected-by-US-recall.pdf ) but if you notice issues it may be worth checking out
and
And Samsung are still advising of an Australian recall on Top Loaders manufactured up to 2013 see:
