Originally Posted by scruff311
I did use an airlock so that could be part of it. I'm going to switch to foil now for the next 12 hours. I do see some condensation in the neck of the flask. In terms of color change, I suppose it has lightened slightly but that could just be the yeast falling out of solution and settling on the bottom, thus lightening the overlying liquid. The yeast should be plenty viable as the best before date was December and I bought it from the LHBS who takes good care of their yeast.
I personally use an airlock every time and never had a problem.
Did you add oxygen to the mix before pitching or have the starter on a stir plate?