An extra window is created when splash screen is on the screen.

Step to reproduce :
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1) Run the attached program as follows
 java -splash:animdog.gif SystemTrayNoGUITest
you can see the splash screen on the screen, observe that an extra window is created on the task bar, the window icon is like not matching with the new java icon. You can do all the operation on the splash screen that you do on the frame. like minimize , maximizing , move , resizing & close.

This is reproduce on from b59d to mustang b84. This is works fine mustang b42. Hence this is a regression.