I'm getting a banner telling me to cast my last vote on the moderator elections but I've already cast three votes. I've refreshed the page but still get the message. I've also verified that my 1st, 2nd and 3rd choices are selected on the voting page.
If you mean the message that says Cast your final vote in the Server Fault 2011 community moderator election! then I believe that's just a system message reminding people to vote. I agree the wording could be clearer though.