Direct from http://www.mlive.com:
More than 500,000 car seats made by Diono have been recalled due to a risk that they will not properly protect children in the event of a crash.
The National Highway Traffic Safety Administration reports in documents posted Oct. 6 that 519,052 car seats are included in the recall. Diono was formerly known as Sunshine Kids Juvenile, and the recall includes its Radian R100, Radian R120, Radian RXT, Olympia, Pacifica and Rainier car seats.
The reason for the recall is due to the NHTSA ruling that when the seats are secured only using the lap belt that children weighing more than 65 pounds will have an increased risk of chest injury during a crash.