This patch will change the cape smash. I thought it was too powerful in the original game- So now, a cape smash causes carriable items (or enemies, I.E. Goomba and Koopa) to fly into the air, but other sprites to stay on the ground. Additionally, when mario smashes the ground, he is bounced back, flying, into the air.
So it's more of a cape "bounce," now, I suppose.
Moderator's note: pretty fun patch that now works with SA-1 as well.