Apple today released Java for Mac OS X 10.6 Update 4 which delivers improved compatibility, security, and reliability by updating Java SE 6 to 1.6.0_24.
Apple advises users to please quit any web browsers and Java applications before installing this update.
Java for Mac OS X 10.6 Update 4 is available via Software Update and also as a standalone installer.
More info and download link (74.81 MB) here.
See http://support.apple.com/kb/HT4439 for more details about this update.
See http://support.apple.com/kb/HT1222 for information about the security content of this update.