As per the OVSD release notes/supported platforms list, it is not supported. However, I have tried installing OVSD application server on Java 1.4 and it works fine. But would like to mention one thing. You need to test, test and test. I haven't tried all the features of OVSD with this new version of Java. The features which I am using might work, Where as the others may give problems. Depends on Service pack as well. So, please test thoroughly before you conclude.