Comment 1 for bug 504369

Someone can just push different code up to invalidate an existing vote - I think this approach adds unnecessary friction to the UI. Certainly in the bzr team we're finding resubmit unpleasant to use, and it doesn't fit the mental model of a changing bit of code that is being evolved-and-reviewed.

I can see a case for locking down an MP when its in state 'approved', but thats really the last step in the process anyway.