Forum:Errata and previous cards

If there is an Errata version of a card and it's effect differs from the previous versions, are all previous versions treated with the same effect?

For example, say a card can summon certain monsters from your graveyard. Then the Errata card is released and now requires you to remove from play a monster from your grave. Are they treated as cards with different effects or does the Errata version's effect now apply to the old version?

71.227.20.51 05:35, February 7, 2010 (UTC)Totallyrandomdude