Java applets that worked fine under 10.6 don't work under 10.7. What can I do to correct this?

Java applets that worked just fine are no longer working after upgrading to MacOS X 10.7 (Lion).  Here is one example: 
So far, I've found two Java Applets that have become inoperative under 10.7.  Here's one example: http://www.vimas.com/videoLarge.php
I did download and install the Java  VM for Lion and I did "activate" the applet when prompted to do so.  However, the example  cited above fails to load.
A second example is  JFileUpload which enables a drag & drop UI with which to upload files.  Worked great under 10.6 but under 10.7 dropping a file on the UI only causes the web browser to display the file, not upload it.

@etresoft: "You have old cache files left over from you Snow Leopard Java installation. Just run the Jave Preferences application and delete your cache files."
I did that right off but this is not the issue and that tactic didn't work.  Apple has acknowledged the issue and the workaround (extract the applet from the web page) seems to suggest that Safari is at fault.  Safari 5.2 was just released today but, unfortunately, doesn't correct this issue.
In the case of the applet that I use most often (JFileUpload), it also has a File menu so I use that instead.  Nonetheless, I sure do miss drag & drop.  As more and more of our Mac users upgrade to Lion and bump into this issue, we expect our  support effort to be challenged with an increasing number of irate users.  It doesn't help to be able to say "It's Apple's Fault" but that's all we can say.

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