I have a series 2 watch and just read that the new os 4 will come with auto pause for running. I use Strava to bike and that has an auto pause. Does anyone know if I am overlooking an autopause function in my series 2 or if the ios 4 running auto pause will work for walking as well? I find myself always forgetting to shut off the walking tracker on my watch and as a result the results get skewed. Thanks