This subject has nothing to do with Davis, it has been going on for years. First there is suspicion about Chuck Hagel who owned a voting machine company and decided to run for the senate. He won by margins that were nothing like the opinion polls so some people believe he may have rigged it with his own machines. Next IIRC there were about 10 seats in the last election where electronic voting machines were used with no paper trail and the results were very different to the opinion polls.
After this someone leaked confidential memos from Diebold that showed someone could log into any voting machine and just change the numbers to whatever they liked, and there was no way to detect it. So any programmer if he wanted to in the company could probably swing a whole election even like California. Some people think that's what happened in Georgia.
So it's nothing to do with Davis, it's whether it's appropriate for voting machines to be so easily hacked when state and federal elections are at stake. These results show someone may have been doing it with Diebold in California, adding votes to smaller candidates and siphoning them off from someone. For all we know they might have been taking votes from Davis.
It gets down to whether vote fraud is an important issue or not. The voting machines are owned by hard right wingers. As it stands now they could probably elect whoever they want to, no one can even examine the software code as it's a trade secret. You could just as easily though have a left winger programmer who decides to throw the presidency next year to his own candidate. A lot of people are trying to have this problem fixed by making a vote also come with a receipt you deposit separately so you can do a recount by counting them by hand.