Argentina always plays up the issue of the Falkland Islands to divert attention from unpopular reforms, and legislation. Their rhetoric has also increased since the discovery of billions of pounds worth of oil in Falkland waters.
I am not at all concerned about this issue. The islands are secured by the British Armed Forces, and the idea of Argentina even looking into the option of attacking is just silly. The most extreme of actions they can take is withdraw their ambassador in London, and ask Her Majesty's Ambassador in Buenos Aires to leave.