Yes, Apple has a great development team, but it's also someone's responsibility at Apple to make sure information about why they released a 1.1 version, shows up in the Software Update description of the update, instead of burying it in an Apple article that 99% of users won't know exists. I'm not thinking that all bugs are always inexcusable or unavoidable (though in a few cases that's true), but rather that Apple needs to communicate with users better.
My point is that it's part of a culture of non-admission of fault that's been normal procedure at Apple for many years. It doesn't help. Apple drops the ball nearly every time they're given the opportunity to communicate with users about a problem. For most practical purposes, almost the only apologies, acknowledgments of problems, etc. we receive from Apple, are occasional public statements from Steve Jobs, and eventual admissions of hardware and software problems from Apple telephone technical support, usually months after the rest of the world knows about them, and occasional Apple articles (too few to address enough of the problems people are struggling with), and some Apple Geniuses who tell users the straight dope.
As someone points out in a reply to my comment below, Apple released an article at the same time they released Security Updater 2007-009 1.1 (http://docs.info.apple.com/article.html?artnum=307224), describing one thing that the 1.1 update is supposed to fix: Safari crashing. But Security Updater 2007-009 1.0 causes more problems for some people than just Safari crashing--there are a number of other Safari bugs that it causes for some people, but hopefully the 1.1 update will fix those too, but if so, Apple should have mentioned that in the article. Security Updater 2007-009 1.0 also causes a number of other non-Safari bugs for a few people, such as disabling Appletalk, preventing disk images from mounting, only one core of a dual-processor Mac working, etc. As usual with any software installation, some miscellaneous problems occur afterwards, and maybe that's not always something that can be avoided due to variations in people's systems, add-ons they've installed, underlying problems like directory damage, bad blocks on the hard drive, etc. that interfere with a proper installation, but too often the bugs Apple introduces in their updates, are the fault of the update, and Apple doesn't have much of a mechanism for working with users on those problems.
If Apple wants to appear "corporate" (a longstanding struggle for them, from the beginning), then they should publicly address issues more, not less. The descriptions in Software Update for any of Apple's installers and updaters, is one good place where more descriptive messages to the public should be located.