It appears that the version string, which is normally only four characters separated by commas, is now five characters long, so some programs erroneously see the version as 10.4.1 -- ha ha! So Apple breaking with normal decimal convention IS coming back to bite
well, other developers and those who use their software, but still!
http://www.macfixit.com/article.php?story=20070628105254900
http://www.macfixit.com/article.php?story=20070628105254900