Unfortunately I couldn't break the news when I heard it as I was at work (no way I'm blogging from there, my boss reads this - hi Mark :D), but Symantec has updated the original KB article to something much, much more reasonable (although it seems to be offline at the minute).
No company is immune from the odd premature / alarmist KB article, and however this happened doesn't matter as much as the outcome. I'm sure a lot was going on behind the scenes before I broke the news, but still I'd like to think we all played some part in getting it cleared up so quickly. Power to the people :-)