Big difference from the Enron style of hiding debt. MS apparantly was hiding profit from good quarters to pad earnings in bad quarters.
The US Securities and Exchange Commission investigation into Microsoft thinks the company may have been holding back cash in order to manipulate future earnings, according to the Wall Street Journal. Astute CFOs who do such things essentially 'hide' money from good quarters in order to pad out the more sluggish ones, thus allowing their company to 'beat the Street' with monotonous regularity, to the unbounded joy of shareholders, Street and analysts alike.
Yet another [link|http://www.theregister.co.uk/content/4/24046.html|Register] piece.