The goals against were a nonexistent back check by Kovalchuk and bad play by Josefson. A bad play by Josefson again on the PK and a weak goal by Hedberg. The third was a bad play by Larsson trying to force a play to Kovalchuk that wasn't there and a boneheaded pokecheck by Hedberg.
They were all individual errors more than anything. The Devils are flying compared to their last few games.