My two macs don't have any problems with LW and os x 10.3.9. reinstall java security update
http://docs.info.apple.com/article.html?artnum=300980
If that doesn't work the other possibility to fix the problem is to download and install the 10.3 -> 10.3.9 combo update
http://www.apple.com/downloads/macos...pdate1039.html
bonne chance