It sounds like both the recent Safari and IE security updates are causing user headaches. It sounds like IE is either failing to start or failing to connect to the Internet while Safari is crashing frequently for some people. How big of a problem? I've no idea, but big enough to get some press.
Web browsers are some of the most complex pieces of software that a consumer will come into contact with. Even the smallest of changes can have a widespread impact. At Mozilla, we are fortunate to have the best engineers in the world, an increasingly robust test framework, great QA people and processes, and tens of thousands of people following every change in the code that we make. This lets us turn around security updates in less than a week in most cases. But, as we're seeing with Safari and IE, and as we saw with Firefox 2.0.0.10, sometimes flaws creep in or are exposed by changes you make when trying to keep users secure.
