It's difficult to try and repro this one without going through the rigmarole of setting up a new account, so it may be a case of PEBKAC rather than a genuine bug, but:
I clicked "mark all as read" in site feedback (accidentally as it happens...)
I returned the the coffeehouse and everything was marked as read.
thanks! i'll report this bug to the dev team.
@GoddersUK: That issue was posted on the connect site (back when it existed). I don't recall if there was a response stating by design, bug, or what.
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