It looks like the JavaVMs/JDKs have been updated for security fixes.
Sun security blog
4 March 2008, Sun will release the following security updates:
* JDK and JRE 6 Update 5
* JDK and JRE 5.0 Update 15
* SDK and JRE 1.4.2_17
* SDK and JRE 1.3.1_22
Sun security blog
4 March 2008, Sun will release the following security updates:
* JDK and JRE 6 Update 5
* JDK and JRE 5.0 Update 15
* SDK and JRE 1.4.2_17
* SDK and JRE 1.3.1_22