Apple's largest OS X security update

Apple released it’s largest batch of security bug fixes for OS X yesterday. MacMedics’ stance on Apple security updates is that in most cases they should be run as soon as possible.
There are a few exceptions to this rule, one of them being that you should never run an update while you are in the middle of completing a job. We instead recommend that you wait until you have completed anything that is on deadline and then run the updates. In other cases of software updates from Apple, we usually like to take a more cautious approach, and wait to see how the update fares before we start installing it for our clients.
It is important that you check and verify that your data is fully backed up and readily accessible before undertaking any system update. When running an Apple system update it is also recommended that you unplug any attached hard drives, iPods, or any other USB or FireWire devices.
Security Update 2009-001 is recommended for all users and improves the security of Mac OS X. Previous security updates have been incorporated into this security update.
For information on this update, please visit Apple’s website.
Java for Mac OS X 10.5 Update 3 delivers improvements to the security and compatibility of Java on Mac OS X 10.5.6 and later.
Further information regarding this update is available from Apple’s website.
For more detailed information on installing Apple system updates, please see our webpage at http://www.macmedics.com/updates.htm