Individual people in Argentina may well believe that they have a right to the Malvinas, but the official Argentinian government has not asserted any claim to them since 1982 (when the Falklands war occurred, for anyone unaware of it :)
http://docs.google.com/gview?a=v&q=cache:RZIivRFbg_8J:ww...
Additionally, the president of Argentina raised the issue with the UK Prime Minister in their meeting in Chile earlier this year.
So anyway, Argentina claims the Falklands/Malvinas as their territory, but your or my opinion on the claim is irrelevant to the discussion. My point is, that maps.google.com.ar, the Argentine version of Google maps, shows a map supporting the British side of the claim, which is inconsistent with the policy described by the article.
http://maps.google.com.ar/?ie=UTF8&ll=-51.76104,-59.8178...