Alright folks, I got a flat today and this is the second time via the same scenario. I was at home in my apartment when I heard a hissing. The first time was late at night and I was unsober and thought maybe someone had tossed some dynamite in the window. This time I just sat and said damn! Anyway...the flat was on my front tire and is a small hole where the valve meets the rubber. This was not due to glass, nails, et al. The first time was in the same spot. Any ideas why my tubes are doing this? Running at too many psi's? Wear and tear? It was an old tube with patches on it so I got some good life out of it, but I'm wondering now since this is how my last two flats have happened. Well, better to be at home than on the road in freezing rain. Thanks.