"There's a great deal more behind this than we can safely detail here", report the pair, "but suffice to say that we have been sent links detailing precise weaknesses and methods that might be used to crack, hack and otherwise alter what's recorded by the online systems. Systems, let's remind ourselves, that might count in narrow contests tomorrow. At the least, it would give a losing candidate something to argue in court."
The article goes on to discuss other recent features on the subject of on-line voting and security (or the lack of it).
Hacking The Online Ballot Box