diff --git a/src/net/java/sip/communicator/impl/gui/main/call/DesktopSharingFrame.java b/src/net/java/sip/communicator/impl/gui/main/call/DesktopSharingFrame.java
index 4b47835a5..2cc12bec1 100644
--- a/src/net/java/sip/communicator/impl/gui/main/call/DesktopSharingFrame.java
+++ b/src/net/java/sip/communicator/impl/gui/main/call/DesktopSharingFrame.java
@@ -522,12 +522,9 @@ public void actionPerformed(ActionEvent e)
                     sharingRegionHeight = sharingRegion.getHeight() + cropY;
                     int y = location.y - cropY;
 
-                    DisplayMode dm = sharingRegion
-                        .getGraphicsConfiguration()
-                        .getDevice()
-                        .getDisplayMode();
-                    int maxWidth = dm.getWidth() - x;
-                    int maxHeight = dm.getHeight() - y;
+                    Rectangle rectangle = ScreenInformation.getScreenBounds();
+                    int maxWidth = rectangle.width - x;
+                    int maxHeight = rectangle.height - y;
                     // Checks that the region sharing does not go outside the
                     // right border of the current screen.
                     if(sharingRegionWidth > maxWidth)
@@ -541,18 +538,23 @@ public void actionPerformed(ActionEvent e)
                         sharingRegionHeight = maxHeight;
                     }
 
-                    // Moves and resizes the sharing region to corresponds to
-                    // the true shared region.
-                    //sharingRegion.setBounds(x, y, sharingRegionWidth, sharingRegionHeight);
-
                     frame.dispose();
 
                     if (call != null)
                         CallManager.enableRegionDesktopSharing(
-                            call, x, y, sharingRegionWidth, sharingRegionHeight);
+                                call,
+                                x,
+                                y,
+                                sharingRegionWidth,
+                                sharingRegionHeight);
                     else
                         CallManager.createRegionDesktopSharing(
-                            protocolProvider, contact, x, y, sharingRegionWidth, sharingRegionHeight);
+                                protocolProvider,
+                                contact,
+                                x,
+                                y,
+                                sharingRegionWidth,
+                                sharingRegionHeight);
                 }
             });
         }
diff --git a/src/net/java/sip/communicator/impl/neomedia/VideoMediaStreamImpl.java b/src/net/java/sip/communicator/impl/neomedia/VideoMediaStreamImpl.java
index ad582fc6f..f18071783 100644
--- a/src/net/java/sip/communicator/impl/neomedia/VideoMediaStreamImpl.java
+++ b/src/net/java/sip/communicator/impl/neomedia/VideoMediaStreamImpl.java
@@ -1088,9 +1088,13 @@ public void movePartialDesktopStreaming(int x, int y)
             ds = ds2.getWrappedDataSource();
         }
 
+        // Makes the screen detection with a point inside a real screen:
+        // (x and y > 0).
+        int tmpX = (x < 0)? 0: x;
+        int tmpY = (y < 0)? 0: y;
         ScreenDevice screen =
             NeomediaActivator.getMediaServiceImpl().getScreenForPoint(
-                new Point(x, y));
+                new Point(tmpX, tmpY));
         ScreenDevice currentScreen = screen;
 
         if(screen == null)
diff --git a/src/net/java/sip/communicator/impl/neomedia/jmfext/media/protocol/imgstreaming/DataSource.java b/src/net/java/sip/communicator/impl/neomedia/jmfext/media/protocol/imgstreaming/DataSource.java
index 3095e5b41..af3d28f27 100644
--- a/src/net/java/sip/communicator/impl/neomedia/jmfext/media/protocol/imgstreaming/DataSource.java
+++ b/src/net/java/sip/communicator/impl/neomedia/jmfext/media/protocol/imgstreaming/DataSource.java
@@ -8,8 +8,12 @@
 
 import javax.media.*;
 import javax.media.control.*;
+import javax.media.protocol.*;
 
 import net.java.sip.communicator.impl.neomedia.jmfext.media.protocol.*;
+import net.java.sip.communicator.impl.neomedia.protocol.*;
+
+import net.sf.fmj.media.protocol.*;
 
 /**
  * Implements <tt>CaptureDevice</tt> and <tt>DataSource</tt> for the purposes of
@@ -21,12 +25,20 @@
  */
 public class DataSource
     extends AbstractVideoPullBufferCaptureDevice
+    implements MuteDataSource,
+            SourceCloneable
 {
     /**
      * Stream created.
      */
     private ImageStream stream = null;
 
+    /**
+     * The cloneable representation of this DataSource.
+     */
+    private CloneableCaptureDevicePullBufferDataSource cloneableDataSource
+        = null;
+
     /**
      * Initializes a new <tt>DataSource</tt> instance.
      */
@@ -111,4 +123,46 @@ protected AbstractPullBufferStream createStream(
         this.stream = stream;
         return stream;
     }
+
+    /**
+     * Determines whether this <tt>DataSource</tt> is mute.
+     *
+     * An image / desktop sharing does not send any
+     * sounds. Thus it is always mute (returns always true).
+     *
+     * @return <tt>true</tt> since  this <tt>DataSource</tt> is always mute.
+     */
+    public boolean isMute()
+    {
+        return true;
+    }
+
+    /**
+     * Sets the mute state of this <tt>DataSource</tt>.
+     *
+     * Does not change anything, since image /
+     * desktop sharing does not send any sounds. Thus it is always mute.
+     *
+     * @param mute <tt>true</tt> to mute this <tt>DataSource</tt>; otherwise,
+     *            <tt>false</tt>
+     */
+    public void setMute(boolean mute)
+    {
+    }
+
+    /**
+     * Based on JMF testing, the clone is in the same state as the original
+     * (opened and connected if the original is), but at the beginning of the
+     * media, not whatever position the original is.
+     */
+    public javax.media.protocol.DataSource createClone()
+    {
+        if(this.cloneableDataSource == null)
+        {
+            this.cloneableDataSource
+                = new CloneableCaptureDevicePullBufferDataSource(this);
+        }
+
+        return this.cloneableDataSource.createClone();
+    }
 }
diff --git a/src/net/java/sip/communicator/impl/protocol/jabber/OperationSetDesktopStreamingJabberImpl.java b/src/net/java/sip/communicator/impl/protocol/jabber/OperationSetDesktopStreamingJabberImpl.java
index dde9b31a2..6a3323048 100644
--- a/src/net/java/sip/communicator/impl/protocol/jabber/OperationSetDesktopStreamingJabberImpl.java
+++ b/src/net/java/sip/communicator/impl/protocol/jabber/OperationSetDesktopStreamingJabberImpl.java
@@ -293,8 +293,7 @@ public boolean isPartialStreaming(Call call)
      * @param x new x coordinate origin
      * @param y new y coordinate origin
      */
-    public void movePartialDesktopStreaming(Call call, int x,
-            int y)
+    public void movePartialDesktopStreaming(Call call, int x, int y)
     {
         CallJabberImpl callImpl = (CallJabberImpl)call;
         VideoMediaStream videoStream = (VideoMediaStream)