I still can't work out what happened.
It appears that it somehow reverted to edit mode. So I've republished it.
All should now be fine except you might get it again in your inbox if you have an email subscription
My apologies for cluttering up your inbox if this happens.
UPDATE: Just had a question about the Polls - and I should have made this clear:
- the polls are hosted on Polldaddy - completely independent of the Call For Votes Post - and are and were completely unaffected
- That mean's you don't need to vote again
- If you try you should find that the system won't let you!