Quote Cruncher="Cruncher"So when he released the ball to the floor with his right hand, and then touched it down with his left - that doesn't count as a knock-on?'"
Sadly the ruling these days is 'downwards pressure'. Nothing about control.
He lost the ball with his right hand, but managed to apply 'downwards pressure' before knocking on. It's not a try in my book, but sadly it is according to the rules.