You should do the check box to vote. you should see the count increment by one. The share button is if you want to send the announcement on to other friends. The notice about the Challenge receiving your public profile and friend list Is, I think, allowing them to present the list of friends to you when you hit the share button, so you can select those you wish to share with.
Ok, I go to the page, it says Vote for the Winner. The two options are "Share" (presumably on FB) OR there is a small box with a number count and a blank box. When I click on that it says "The Artexpo Poseter Challenge will receive the following info: your Public Profile and friend list."
Now how is that a vote?
Need to leave or subscribe to the Sciart-L listserv? Follow the instructions at