Update: Here's a great explanation by former Packers VP, Andrew Brandt, on what the Redskins did that got them in trouble.
NFL is taking away millions of dolllar of salary-cap space from Cowboys and Redskins for how they front-loaded deals during uncapped year.— Adam Schefter (@AdamSchefter) March 12, 2012
The penalty stems from dumping salaries and bonuses into the uncapped year of 2010, most notably Fat Albert and DeAngelo Hall.
Cowboys lose $10 million in cap space, Redskins lose $36 million in space. Can split it over 2012 and 2013 any way they want. More at ESPN.— Adam Schefter (@AdamSchefter) March 12, 2012