You may have ran the old installer after redownloading. Make sure you delete all the old installers before downloading. Safari automatically renames new downloads if an existing file has the same name, so you may not run the file you think you're downloading.

That said, you should also run http://docs.info.apple.com/article.html?artnum=120242 , which will upgrade your Java to 1.4. That will also fix the problem you're seeing.