Much of which had to do with them overpaying when they bought the Wall Street Journal, according to that article....
The article's wording is a little inaccurate.
Most of that $3 billion write-down is goodwill write-down, which just means that NewsCorp decided that the non-cash valuation of intangible assets related to their newspaper division, including WSJ, could no longe be valued above market due to stockholders' confidence in the brand and the acquisition.
NewsCorps basically said, "given the economy's affect on declining advertising sales, we're re-valuing our intangible assets to more accurately reflect their value".
So, while the re-valuation was severe, it doesn't actually represent "loss" in the traditional sense, so they're actually doing better than article says they are, and the 10-Q they've filed since then for 3Q backs that up.