IE voting issue seems to be fixed this morning 
If you click the option that is already choosen it removes your vote.
For me, IE8, doesn't kick me anywhere, but it does act differently as far as the rating is concerned. Before if I upped the rating and then downed the rating it would back to zero, if it started at zero. I upped your post and it went to 1, but when I downed it, it went to -1.
If you click the option that is already choosen it removes your vote.