Tested JRE: b130-pit http://rehudson.sfbay.sun.com/hudsonws/deploypit/bundles/ Label: b255-2011-02-10_39
Tested OS: winxp
Tested Browser: firefox3.6, IE8

Steps to reproduce:
1) Clear deploment cache
2) Launch the following applet in browser:
http://rehte.cn.oracle.com:8080/wshost/new_ws/deployment/src/plugin/Decoration/Decoration/html/DecorationTrueJnlp.html
this jnlp applet can be dragged out, and has shortcut hint in jnlp file
3) Drag the applet out of browser
4) Close the browser, if the applet also close, bug is reproduced

Source code location:
http://rehte.cn.oracle.com:8080/wshost/new_ws/deployment/src/plugin/Decoration/Decoration/src/
Add another applet which can reproduce this bug
http://sqeweb.sfbay.sun.com/deployment2/jitu/latest_ws_test/6/deployment/src/plugin/DnD/DnD/html/DragExample.html