http://www.afl.com.au/tabid/208/default.aspx?newsid=129639
"Goodes was booked for sliding feet-first into Hunt during the second half of the Swans' 16-point loss to the Cats on Friday night.
The incident was assessed as reckless conduct and low impact, meaning Goodes drew an initial penalty of 125 demerit points."
So basically he did something very similar less than 8 weeks ago and copped a week for it.
Obviously has not learned or adjusted the way he attacks a player who is on the ground.
He has not been reported for sliding the feet and he was right next to the bloke when they got to the contest so there was no SLIDING.