It sounds like it might just be green. I made a couple beers with fruit/pumpkin in them and they were very bitter during the entire brewing and bottling. I had to let them sit and condition for 3 weeks before they were good.
Melancholy Dog Brewery
Planed: more cider.
Secondary:Dry hopped amber ale, Does Equis clone.
Keged:Pumpkin spice, wizen.
Bottled: Hard cider, Oaked bourbon vanilla cider, Vanilla Porter.