Voters have boasted of returning multiple same-sex marriage survey forms after receiving mail addressed to previous residents.
Malcolm Turnbull has sought advice on how to extend the life of a number of coal-fired power stations which are scheduled to close over coming decades.
UPDATED: The Turnbull government faces a possible constitutional crisis after Deputy Prime Minister Barnaby Joyce was told he could be a citizen of New Zealand.
Malcolm Turnbull has ruled out any further action on same-sex marriage if the High Court strikes down the government's national postal ballot.
A Liberal senator is pressing ahead with a bill to allow same-sex marriage, labelling the government's plebiscite policy "divisive" and aimed at delaying change.
Tony Abbott's message was a shot across the bow for Malcolm Turnbull: "It's obviously a dramatic loss of discipline inside the government and it's a serious attack on the authority of the leadership."