Internet Explorer JApplet hang close intermittent jre 1.4.1

I've browsed several similar topics here. So let me add my problem.
The environment is Internet Explorer 6.0 and the JRE release is 1.4.1. I have an applet that will either put up a JDialog subclass or an instance of a JOptionPane (for errors and warnings). Sometimes the browser closes fine on close (x button in top right of frame). Sometimes it hangs. I am not sure if destroy is ever getting invoked when it hangs as I tried putting a System.out.println() in and never saw the output. When it closes properly I do briefly see the outputs in the jre plugin window. Another similarity to other posts is this applet uses sockets (mySQL) and the destroy method is where I close the connection. Other posts claim using sockets for one thing or another, so that may be a culprit. Oddly, I have not seen posts that reference previous versions of the JRE so I am guessing maybe it's a problem with the 1.4.1 JRE? It's a wild shot but I am trying to ascertain commonality amoung all the similar posts. There doesn't seem to be a difference in being a signed jar or not. I can supply further info to anyone who might have an idea. Also, I can not reliably reproduce.
Thanks,
Walt

Maybe the problem with the applet is that you are using the same instances of JPanels and JComponents in the Applet each time you intialize it. I had this problem, because I was reusing the panels to reduce the load time to generate them, but the problem was that when I did this, I couldn't write in a JTextField of this panels, and when I try to close the IE window after trying to write in a JTextField, the IE crashed.
Maybe it isn't your problem, but it may help.

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*http://instantteleseminar.com/?eventid=29457633
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