Wrong question?
Maybe the theme of the question should be rephrased from 'what is wrong with e-voting' to something like 'how will people be able to use and/or abuse e-voting'?
I mean the box is just a box whether it is a big steel one or a digital virtual one and notions of finality are newish concepts (any vote can be changed and all votes are finalised at blah-blah time of such-n-such date?)
The problem will always be people rather than objects until it is costed that is?