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Product Version = NetBeans IDE Dev (Build 201004030201) Operating System = Linux version 2.6.32-19-generic running on i386 Java; VM; Vendor = 1.6.0_19 Runtime = Java HotSpot(TM) Client VM 16.2-b04 When editing, if the user has used the search&replace dialog then moved the mouse to the editor, the dialog remains on the screen and no longer responds to the <ESC> keystroke even though it is the front most window on the screen. If a dialog is front most on the screen, there are a few keys that should always be handled. These are, at minimum <ESC> to close it and <F1> to get help for the top-most dialog.
When the dialog does not have focus (the editor has it) it does not handle any keystrokes. If you give the dialog the focus it will handle Esc just fine (I have just tried). This is as expected and I am closing this report as invalid.