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1. The UserList is wide open. It used to only be available once you logged in.

The setting is set to Registered members only, and I get a blank page if I try to get to it when logged out. Is this different then what you are seeing?

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3. What's the shortcut to be automailed with responses to my posts, like in the old days? I'm afraid I might miss one and neglect to respond to someone asking me a question.

It's gone. You can add a thread to your favorites and be notified of responses to the thread, but the "e-mail me on reply to my posts" disappeared somewhere in the upgrade. I have asked for it back with no response so far.