I am having the same problem. I also checked my sources.list file. Curiously, a few days ago, I was having the signature problem, and so I waited until others reported it working (I’m talking about this discussion).
I am having the same problem. I also checked my sources.list file. Curiously, a few days ago, I was having the signature problem, and so I waited until others reported it working (I’m talking about this discussion).