"She was supposed to pay a fine for writing something in her book." No. She leaked documents from the Court (where she was employed) in order to make her point (pro-Croat one).
As a journalist she was devoted to the Croatian cause in the Le Monde Newspaper, which is her complete right. However, when employed by the Court of Justice, she was not supposed to jeopardized inquisitions and normal set of rules (i.e. confidentiality), was fired and fined. France refused to execute a decision of Justice.
http://news.bbc.co.uk/1/hi/world/europe/8253992.stm