FULL PRODUCT VERSION :
java version "1.7.0_55"
Java(TM) SE Runtime Environment (build 1.7.0_55-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.55-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601] (Windows 7 x64).
However, I assume *ANY* windows version will be ok.

EXTRA RELEVANT SYSTEM CONFIGURATION :
Not relevant

A DESCRIPTION OF THE PROBLEM :
When java.awt.Robot class is used to move system mouse cursor, occasionally it resets the mouse move speed to default.

This happens because windows implementation of Robot, \jdk\src\windows\native\sun\windows\awt_Robot.cpp doesn't check if a call to SystemParametersInfo(SPI_GETMOUSESPEED, 0, &oldSpeed,0) succeeds. As oldSpeed variable is initialized by 10 (default value), the next call ( bResult = SystemParametersInfo(SPI_SETMOUSESPEED, 0, (PVOID)oldSpeed,
                                     SPIF_SENDCHANGE);
) will rewrite the actual value to 10.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) You need to configure mouse speed which is not default, i.e. slower or faster
2) Move a mouse to any coordinates by calling java.awt.Robot#mouseMove

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Mouse speed is not affected by this call
ACTUAL -
Mouse speed is reset to default

REPRODUCIBILITY :
This bug can be reproduced often.

---------- BEGIN SOURCE ----------
import java.awt.*;

/**
 * Created by dgalimov on 16.04.14.
 */
public class Main {

    public static void main(String[] args) throws AWTException, InterruptedException {
        while (true) {
            Point currentLocation = MouseInfo.getPointerInfo().getLocation();
            new Robot().mouseMove(currentLocation.x, currentLocation.y);
            Thread.sleep(1);
        }
    }
}

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