According to the TidBits Web site, Security Update 2004-09-07 could end up causing some problems. The update was served up to address a whole bunch of security issues that needed to be dealt with. However, there are also some included changes to Safari that have been causing some Web site rendering issues.

Apple has released Security Update 2004-09-07 to address a slew of security-related issues. Updated components include Apache 2, CoreFoundation, FTP, IPSec, Kerberos, OpenLDAP, OpenSSH, PPPDialer, QuickTime Streaming Server, rsync, Safari, SquirrelMail, and tcpdump - see Apple’s site for details. Unfortunately, two of the changes may have negative consequences. The changes to Safari seem to have caused rendering problems on a number of Web sites, including the FedEx Web site. Also, to work around a problem in the lukemftpd FTP server in the client version of Mac OS X, Apple replaced it with the tnftpd FTP server (Mac OS X Server uses xftp instead); unfortunately the change has caused login difficulties for some users.