Was about to start a thread - but I'm hijacking this one instead! Can you patch a tube where the valve seems to have broken away from the tube a bit? My valve (a presta) looks like it had about a quarter sized chunk of rubber on it. That was then attached somehow to the rest of my tube. That attachment failed overnight, leaving me with one completely flat tube. What do you all think? Patchable?

On a side note - it's an XLC tube and has maybe 100 miles on it. I think I may be avoiding that brand in the future.