It Wasn't Offside

Last night after posting a comment on Steven Davis' recent column, I listened to the podcast of From The Pitch (Dino Costa + Marcelo Balboa; link here). At one point during the interview with Clavijo, Fernando says that league officials have told them that both of the goals Herculez Gomez scored last Thursday night were legitimate. That is, even though the referee crew at the time called him offside, neither actually were. How many more times does this sort of thing need to occur before video replay is introduced?