Where did I go wrong?

[BeerRenter]

Finally tapped the keg of my last batch. It has a sour apple aftertaste. What did I do wrong? Is it time to dump this batch?

 

[EricS]

I think I heard that usually means there has been a bacteria infection, were you very carefull with keeping everything clean?

But if it is more like green apples or a fresh cut pumkin, it just needs more time.

 

[mr x]

I have had that taste on a green brew as well. Cleared up nice after a month.

 

[david_42]

How long since you kegged it? Under a month, it's probably green, over 2 months, probably infected.