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But I'm not sure if you need a certain level of karma.

You do indeed. For me that page says: "Sorry, you need 20 karma to create a poll."

I think that message is out of date. I have exactly 20 karma but it shows me the same message.

Amusingly it works now. Not sure if something was fixed or if there is an off-by-one error (my previous comment was upvoted to give me 21 karma).