No - I certainly can't see any bubbles. It does have a flavor that I can't name, I want to say either 'green' or possibly 'champagne', which does make me wonder if your yeast theory could be it. If it multiplies I'll really be concerned - but now I'm hoping it's just greedy racking and I pulled in some slurry. I was (am) thrilled about the novelty of this quick / easy brew. My other carboy has a cherry wine I've been racking since December, so I'm going the patient route with that one. Need more carboys
Thanks for the great suggestions!