Index: /CKEditor/trunk/_source/plugins/styles/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/styles/plugin.js	(revision 5977)
+++ /CKEditor/trunk/_source/plugins/styles/plugin.js	(revision 5978)
@@ -1152,14 +1152,6 @@
 
 		// Assign all defined styles.
-		if ( def.styles )
-		{
-			for ( var i in def.styles )
-			{
-				if ( !def.styles.hasOwnProperty( i ) )
-					continue;
-
-				el.setStyle( i, def.styles[ i ] );
-			}
-		}
+		if( styles )
+			el.setAttribute( 'style', styles );
 
 		return el;