This weekend’s burp in Movable Type installations — which came because of a conflict in an update of the Control Panel that controls many web servers — reveals an odd vulnerability of citizens’ media. No medium before could be so handicapped by a single bug or glitch (or virus or spam attack). Of course, in blogs, we’re used to it; Blogger used to go down all the time and with it half the Blogosphere then . But what’s oddly unnerving in this case is that an external change could have such an impact. Then again, because this is a community, people shared symptoms and then solutions with dispatch.