Opening the same argument in a second tab no longer loses your review. If a review of that argument already existed — because another tab had just started one, or because an earlier attempt half-finished — the new tab quietly gave up and worked on its own, saving nothing to your account for the rest of the session. It now picks up the review that exists and carries on with it.

Running out of monthly AI budget now says so. Importing from a link or raw text, or asking the argument builder for help, reported a generic failure when the real answer was that the month's budget was spent. You get the actual message, and the same "out of budget" treatment the other AI features already showed.