From The Car Seat Lady:
New recall: Children have been chewing off parts of the rubber HUGS pads on newer Britax convertible seats. The seat MAY BE USED while you are waiting for your recall repair kit. You may leave the HUGS on (if your child is not prone to chewing on them) or remove them if you are concerned (just put the new ones on as soon as you get them).
More information can be found here: http://www.britaxconvertiblerecall.com/