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FULL PRODUCT VERSION : Java 1.7.0_10-b18 ADDITIONAL OS VERSION INFORMATION : Microsoft Windows 7 Version 6.1 (Build 7600) EXTRA RELEVANT SYSTEM CONFIGURATION : This issue requires launching a Java 7 application via an X emulator. One such configuration: X-server: Cygwin/X X Server, Version 1.13.1-1 built on 2012-12-19 A DESCRIPTION OF THE PROBLEM : When launching a Java 7 Swing application from Linux, via a Windows/X-emulator configuration, the cursor in any text field will freeze once a second Frame in launched from within the same process.. REGRESSION. Last worked in version 6u31 STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : 1. Compile and run the attached sample code in Java 7 from an X-emulator so the application originates from Linux, but is visable on Windows 2. Use the JButton to spawn a second JFrame 3. Notice that you can no longer type in either of the text fields. EXPECTED VERSUS ACTUAL BEHAVIOR : EXPECTED - I would expect both text fields to continue to be usable. ACTUAL - The cursor freezes up in both of the texts fields preventing any text from being entered. REPRODUCIBILITY : This bug can be reproduced often. ---------- BEGIN SOURCE ---------- import javax.swing.JButton; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JInternalFrame; import javax.swing.JTextArea; import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class TestTwoFrames { public static void main(String[] args) { final JButton button = new JButton( " Open 2nd frame " ); JFrame frame = createJFrame(button); frame.setVisible(true); button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { createJFrame(null).setVisible(true); } }); } private static JFrame createJFrame(JComponent southie) { JFrame frame = new JFrame(); JTextArea textArea = new JTextArea(10, 50); frame.add(textArea); if (southie != null) { frame.add(southie, BorderLayout.SOUTH); } frame.pack(); return frame; } } ---------- END SOURCE ---------- CUSTOMER SUBMITTED WORKAROUND : Do not spawn a second frame in the same process.