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I was trying to add a comment to this question, but found only "suggest improvements" and "show all comments" links; none for adding new comments.
This appears to be a new thing. I'm not 100% sure, because I may be confusing it with other stacks where I can comment and may just not have noticed that I can't do that here. Why though?
I seem to have sufficient reputation to have earned the privilege; have I done something to have it revoked?