I have another theory: it is to provide cover for vote fraud, by providing an excuse for a mysterious drop in votes for a candidate who was expected to win. (See the George Bush DUI as Example Number One.)
I think the Rats are going to try to rig the election, and this story give them an excuse for a drop in Arnold's numbers. They will switch votes to McClintock in just the same way they tried to claim Buchanan votes for Gore in Florida.
If I were in California, I would darn sure have poll watchers everywhere I could.