Applet: Internet Explorer hung up if UI component is created in stop method

Hello
I'm trying to ask an user is he/she is willing to save some changes in structure that is managed from applet when this user is closing my applet.
Under the jdk 1.4 everything was ok, but in jdk 5.0 it causes internet explorer crashes.
On the web site: http://java.sun.com/j2se/1.5.0/relnotes.html there is a section Java-plugin which says:
Internet Explorer will hang if an applet displays a UI component in its stop() or destroy() method and a user triggers stop() or destroy() by pressing the Back or Refresh button in the brower.
My question are:
Is it a feauture or a bug, will it be improved or it's some security issue?
What can i do to display ui component (i want to know an user choice) on applet closing action?
Thanks in advance for any help.

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Applet: Internet Explorer hung up if UI component is created in stop method

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