More arguments between Beit Shamai and Beit Hillel: to wash one's hands before Borei pri hagafen or after; where to put your wet used serviette during the meal; necessity to wipe away crumbs before mayim Acharonim or not; order of Havdalah done together with Birkat Hamazon, the text of the Bracha over fire in havdala; not using flame or spices of a non-Jew.