I brewed a brown ale last month and kegged it up almost 2 weeks ago. I was out of town the whole first week it was in the keg and didn't get to try any of it until I got home on Friday and it smells not good. It has a plastic, medicinal, smell and I'm now sure where to pinpoint the problem. This is only the second dark beer I've brewed and this is the second time I've had this problem. Last year I brewed an OctoberFAST Ale and didn't get around to kegging it until this past spring. I figured sitting in a better bottle for 8 months had something to do with the off flavors in that batch. This one sat in the fermenter for 17 days and then I kegged it. I had read that chlorine could be a contributing factor but I sanitize with StarSan and according to my Ward Labs report I have 90 ppm of chlorine in my water.