HUGE clue (to someone who can figure it out):
Poured a sample of both brews into a plastic container (not carbed, fresh outta primary) the other day and put them into the fridge. The next day, I took them to the LHBS along with a bottle of apfelwein (bottled a long time ago).
I get there, crack open the plastic containers of flat beer, and pour samples for a few guys. They like it. I have them try the other one. They like that one too. I'm like, wtf is wrong with it? They're all looking stumped as to if anything is wrong with it at all. So I taste it.
It was great! Aside from being flat, it was fantastic. 24hr earlier, it was in a keg and tasted nasty. (I dispensed the beer, flat, from the faucets). So I'm like great, the guys on homebrewtalk are really going to ream me for complaining about the taste of green beer.
Fastforward to right now. The beer in my kegs is
still nasty. And it will remain nasty - I've had it like this before, so I know. Something about pouring it into a plastic container and leaving it in the fridge for 24-48hr and then transporting it to the LHBS fixed it right up. And get this. Even the apfelwein in the bottle tasted good over there. WHAT THE *$%*?! They still taste nasty at my house...
CLIFF'S NOTES:
Beer tastes gross at my house but tastes great at LHBS.