The updates address issues for Java and Security vulnerabilities.  You can update them via software update now.

 

Java Update:

 

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 this website:http://support.apple.com/kb/HT3374

For information on the security content of this update, please visit this website:http://support.apple.com/kb/HT1222

 

Security Update:

 

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 the security content of this update, please visit this website:http://support.apple.com/kb/HT1222.