That's odd; I just did the same process I use on CoinTalk and it went through as expected. Here is a screenshot of me trying another poll (not going to post this one).
I can set polls fine on CT. I can do it here, too...it's just that the little bubble before each option doesn't appear here so there's no way for anyone to make a selection. @toughcoins is looking into it. I'm sure it's just a setting or permission unique to my account.