The EU and Australia recently signed a new trade agreement. One part of that agreement says that Australia will no longer use the denominations Port, Sherry and Marsala for its fortified wines.
Many Australian wines have been called such things, since these kind of naming restrictions simply are governed by international agreements, and no such limitation had previously been agreed. (Do you remember the Danish feta cheese?) The wine producers in Australia say that this will cost them millions of dollars since they will have to change their naming and establish new brand identities.
The agreement also covers e.g. Moselle, Burgundy, Sauterne, and Chablis. In return the Europeans will recognize the Australian wine regions as specific denominations (Coonawarra, South Australia etc) and will allow certain wine making techniques regularly used in Australia but not permitted in Europe to be used for Australian wines imported to Europe (e.g. use of oak chips and copper citrate).