This change is related to Facebook only and brings the game in line with how invites/gifts/boosts MySpace and Hi5. We have enabled in-game accepting of gifts/invites/boosts, Facebook has given developers the ability to delete requests on behalf of players. If you have requests available still accept them, never ignore them, when you hit Zombie Slayer they will get cleared out from your request inbox and you can take appropriate action in game.
As long as our "bucket" size for requests does not get reduced because of this change (which Facebook says it will not) then we can leave it in place, if we do experience a drop we may have to revert it back but we will communicate that change here.
Will this be the case for VC on FB too? I find the way invites and whatnot are working right now annoying. Myspace is way easier in this regard.