Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 4979)
+++ /CKEditor/trunk/CHANGES.html	(revision 4980)
@@ -52,4 +52,5 @@
 		<li><a href="http://dev.fckeditor.net/ticket/4863">#4863</a> : Fixing iframedialog's height doesn't stretch to 100%</li>
 		<li><a href="http://dev.fckeditor.net/ticket/4964">#4964</a> : The BACKSPACE key positioning was not correct in some cases with Firefox.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/4980">#4980</a> : The border, vspace, hspace of img are zero not working.</li>
 		<li><a href="http://dev.fckeditor.net/ticket/4773">#4773</a> : The fileBrowser plugin overwrote any onClick function for a fileButton element.</li>
 		<li><a href="http://dev.fckeditor.net/ticket/4731">#4731</a> : The clipboard plugin was missing a reference to the dialog plugin.</li>
Index: /CKEditor/trunk/_source/plugins/dialogui/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/dialogui/plugin.js	(revision 4979)
+++ /CKEditor/trunk/_source/plugins/dialogui/plugin.js	(revision 4980)
@@ -956,5 +956,5 @@
 				setValue : function( value )
 				{
-					value = value || '';
+					value = ( value != null ) ? value : '';
 					return CKEDITOR.ui.dialog.uiElement.prototype.setValue.call( this, value );
 				},
Index: /CKEditor/trunk/_source/plugins/image/dialogs/image.js
===================================================================
--- /CKEditor/trunk/_source/plugins/image/dialogs/image.js	(revision 4979)
+++ /CKEditor/trunk/_source/plugins/image/dialogs/image.js	(revision 4980)
@@ -801,9 +801,7 @@
 															var value,
 																borderStyle = element.getStyle( 'border-width' );
-
 															borderStyle = borderStyle && borderStyle.match( /^(\d+px)(?: \1 \1 \1)?$/ );
 															value = borderStyle && parseInt( borderStyle[ 1 ], 10 );
-															!value && ( value = element.getAttribute( 'border' ) );
-
+															isNaN ( parseInt( value ) ) && ( value = element.getAttribute( 'border' ) );
 															this.setValue( value );
 														}
@@ -814,5 +812,5 @@
 														if ( type == IMAGE || type == PREVIEW )
 														{
-															if ( value )
+															if ( !isNaN( value ) )
 															{
 																element.setStyle( 'border-width', CKEDITOR.tools.cssLength( value ) );
@@ -874,5 +872,5 @@
 
 															value = ( marginLeftPx == marginRightPx ) && marginLeftPx;
-															!value && ( value = element.getAttribute( 'hspace' ) );
+															isNaN( parseInt( value ) ) && ( value = element.getAttribute( 'hspace' ) );
 
 															this.setValue( value );
@@ -884,5 +882,5 @@
 														if ( type == IMAGE || type == PREVIEW )
 														{
-															if ( value )
+															if ( !isNaN( value ) )
 															{
 																element.setStyle( 'margin-left', CKEDITOR.tools.cssLength( value ) );
@@ -942,5 +940,5 @@
 
 															value = ( marginTopPx == marginBottomPx ) && marginTopPx;
-															!value && ( value = element.getAttribute( 'vspace' ) );
+															isNaN ( parseInt( value ) ) && ( value = element.getAttribute( 'vspace' ) );
 															this.setValue( value );
 														}
@@ -951,5 +949,5 @@
 														if ( type == IMAGE || type == PREVIEW )
 														{
-															if ( value )
+															if ( !isNaN( value ) )
 															{
 																element.setStyle( 'margin-top', CKEDITOR.tools.cssLength( value ) );