I looked back at the the other threads this week that were blockquoted when posted, and now they are centered. I don't know why the change, but I hope it doesn't stay like this. I guess John is tinkering and will hopefully get it fixed, but right now I don't like it. :(
GeeBee had the same problem when she posted Tuesday's thread. It previewed blockquoted, it posted centered.
I agree that the centering looks like Hades. Hope it gets resolved.