ESPN reports here and on SportsCenter that the Ravens practiced too much. As a penalty, they'll lose some practice time.
John Harbaugh, when interviewed, accepted the punishment, saying that they want to run the team within the rules. This system seems to make a lot of sense to me. Too much practice? You are penalized some practice time. If the consequences were as natural in the NCAA, maybe it wouldn't take over a year for overblown allegations to be settled. Of course there are differences between the leagues, but maybe (and I'm not holding my breath) the NCAA could adopt a similarly rational system.