Apple has released Java for Mac OS X 10.5 Update 7 and Java for Mac OS X 10.6 Update 2 to address multiple vulnerabilities. These vulnerabilities may allow an attacker to execute arbitrary code or cause a denial-of-service condition.
I would recommend that anyone who has a Apple computer or administrates an apple computer goto your software updates and install the updates if available.
Check Apple’s KB for more Information:
OS X 10.5 -http://support.apple.com/kb/HT4170
OS X 10.6 -http://support.apple.com/kb/HT4171