The following simplified code sample below, extracted from JCK tests reproduces the problem. Using the code below JVM crash is reproducible approximately in 80%, several attempts might be needed.

JCK tests failed on the first run.

Tests failed on JDK7b50/Vista, issue reproduced and localized on JDK7b54/XP; (BTW JVM crash is not reproducible on Windows 7, and the tests passed on Windows 2003).
Log is attached.

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import java.awt.*;
public class JVMCrash {
    public static void main(String argv[]) throws Exception {
        Frame sharedFrame = new Frame();
        sharedFrame.setVisible(true);
        Thread.sleep(2000);
        sharedFrame.setFocusTraversalPolicy( new ContainerOrderFocusTraversalPolicy() );
        Component comp = new TextField();
        sharedFrame.add(comp);
        comp.requestFocusInWindow();
        sharedFrame.removeAll();
    }
}
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JCK 7 b12 qac
JDK 7 b50
Platform: Windows Vista
TestURL: api/java_awt/awt_focus_subsystem/keyeventdispatcher_keyeventpostprocessor/index.html#KeyEventDispatcher