I have a similar issue. ALL Smuttynose beers taste like pennies to me. All of them, no matter what recipe, where they're brewed, if they're cask conditioned... doesn't matter. They all taste like pennies. SWMBO tastes it too, one of my other friends can taste it but he says it's not so bad. For me, I can barely taste the actual flavors of the beer. It sucks, cuz Smuttynose is so tasty (so I hear). I even emailed a brewer and he said he hasn't heard of the issue before.
I'm thinking I pick up on some mineral quality that the average person doesn't or something. Maybe it's a similar situation for you?