i heard this too and havent since fed potoato. BUT my first bunny Rags, used to always have the potato peelings and such like and he was 13 before he left us, so im guessing its not as bad as its made out to be, but uim not taking any chances!! lol!
Saying that i get confused as to which greens are ok and which arent! so i guess i leave it to h to tell me by what ever he eats!