Index: _source/plugins/styles/plugin.js
===================================================================
--- _source/plugins/styles/plugin.js	(revision 6637)
+++ _source/plugins/styles/plugin.js	(working copy)
@@ -1115,8 +1115,9 @@
 	function removeFromElement( style, element )
 	{
 		var def = style._.definition,
-			attributes = CKEDITOR.tools.extend( {}, def.attributes, getOverrides( style )[ element.getName() ] ),
+			attributes = def.attributes,
 			styles = def.styles,
+			overrides = getOverrides( style )[ element.getName() ],
 			// If the style is only about the element itself, we have to remove the element.
 			removeEmpty = CKEDITOR.tools.isEmpty( attributes ) && CKEDITOR.tools.isEmpty( styles );
 
@@ -1142,6 +1143,8 @@
 			element.removeStyle( styleName );
 		}
 
+		removeOverrides( element, overrides ) ;
+
 		if ( removeEmpty )
 		{
 			!CKEDITOR.dtd.$block[ element.getName() ] || style._.enterMode == CKEDITOR.ENTER_BR && !element.hasAttributes() ?