I have this same problem 2, I harvest one of my first plants on friday. Before I chopped them it had smelled of light citrous, and from then on it smelled like some kind of slightly decayed plant matter. I think my problem was it dried to quickly, it basically hit that 25% of wet weight mark after 2-2.5 days. The weather was so nice that it was 85 in the top of my grow tent where I was drying them (I put up black shirts and garbage bags to limit the light up there). I've tried some out the last couple nights both with a bowl and a vaporizer, and the stuff smokes very smooth and the smoke doesn't smell bad, and it if fairly potent too. I think the smell is starting to revert back to something nice though, I've been curing in glass jars with those metal lid contraptions and a rubber/plastic something seal on it (burping 2-3 times a day).