This weekend I racked into this particular keg for the first time. It has all new orings, and keg lube on all the orings. When I aired it up it was leaking co2 from the beer post. It turned out that the leak seemed to be coming from the actual keg it self. Co2 was bubbling from around the threads that are part of the keg itself. I tried to pry some of the black rubber off but never saw anything. So my question, is the co2 coming from a seal, or the actual keg itself? I even put a different post on, and it did the same thing... help!