To allow users to vote anonymously for ideas the history of votes should be removed.
Voting is an anonymous act (at least on most parts of the wold I hope) and should be in the OTN forums too.
It's too easy to guess who voted in which way, at least until there are more then 5-10 votes on an idea.
Users who want to should how they voted can leaf a comment. This way it's their decision if there name is visible or not.