FULL PRODUCT VERSION :
1.7.0_21

ADDITIONAL OS VERSION INFORMATION :
Darwin Doom.local 12.3.0 Darwin Kernel Version 12.3.0: Sun Jan 6 22:37:10 PST 2013; root:xnu-2050.22.13~1/RELEASE_X86_64 x86_64

EXTRA RELEVANT SYSTEM CONFIGURATION :
Safari version 6.0.3, and Firefox version 20.0 tested.

A DESCRIPTION OF THE PROBLEM :
Applets do not receive keyReleased events from the browser since 1.7.0_21. This bug affected 1.7.0_17 on firefox too. keyReleased events are delivered for 1 key, if two keys are pushed at the same time.

REGRESSION. Last worked in version 7u17

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) Compile the following code, and run it as an applet in Safari or firefox:
2) open the java console
3) push keys in sequence and release each
4) push two keys at once and release boh

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
At 3, first " key down: a " is printed, then " key up: a " is printed.
At 4, first " key down: a " " key down: s " is printed, then " key up: a " " key up: s " is printed.
ACTUAL -
At 3, only " key down: a " is printed.
At 4, first " key down: a " " key down: s " is printed, then " key up: a " is printed.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

import java.applet.Applet;
import java.awt.event.*;

public class TextDumbness extends Applet
{
private static final long serialVersionUID = -9119217490277606380L;

public void init ()
{
System.out.println(System.getProperty( " java.version " ));

addMouseWheelListener(new MouseWheelListener() {
public void mouseWheelMoved(MouseWheelEvent e)
{
System.out.println( " scroll " );
}
});
        addKeyListener(new KeyListener() {
            public void keyPressed(KeyEvent e)
            {
                System.out.println( " Key down: " + e.getKeyChar());
            }
            public void keyReleased(KeyEvent e)
            {
                System.out.println( " Key up: " + e.getKeyChar());
            }
            public void keyTyped(KeyEvent e)
            {
            }
        });
}
}

---------- END SOURCE ----------