I've been using the 1.0 discs pieces of eight and Mickey's sorcerer hat. I haven't had a problem but when my brother tried to use the same discs, while on second player, they kept disconnecting every couple of seconds.
"The past can hurt, but the way I see it, you can either run from it or learn from it." - Rafiki
"You must not let anyone define your limits because of where you come from, your only limit is your soul." - Gusteau (Ratatouille)