Take a look at Receipts folder sample image & you'll see a few Java versions. One is the security update (oh I just realised the JavaSecurityUpdate4.pkg doesn't show in that example.) However, I've found a lot of people have been able to solve the issue by re-installing Java 1.42_update2. If you choose that one, then that's the one you'd need to remove from the receipts folder; ie: Java1.42_Update2.pkg
Get that installer here http://www.apple.com/downloads/macos...update142.html

The Java 1.42 for Tiger is a different install. AFAIK it's still this one (if you're having similar problems): Java 1.4.2 for Tiger (click on link)

But if you have Tiger, you might be just as well off getting Java 1.5 (however you'd need to follow the suggestions in the following link to force LW to use it ... it won't use it unless you use java utility to tell it to): http://docs.info.apple.com/article.html?artnum=301073
There should be some small improvements by allowing LW to use Java 1.5