It's somewhat depressing that there actually are people out there who have nothing better to do than to sit at their computer pressing F5 all day on political candidates' Twitter accounts, hoping to catch typos that last for all of 5 minutes.
Live feed, no need to use F5. Not only that, but political campaigns, labor officials, and bloggers routinely set up email alerts to major candidate's twitter feeds. Not just to look for typos, but rather for breaking news (like the linked press release, which went to the weird YouTube), contradictions, and potentially damning mistakes. Twitter mistakes have hurt candidates in media cycles stretching from Joe Miller to Mark Kirk.
Considering the amount of people that follow the #CAGov hashtabs, I would imagine that the liberal California political types who happened to be on Twitter that day, would have drummed up the mistake all on their own, but who knows.