Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 5971)
+++ /CKEditor/trunk/CHANGES.html	(revision 5972)
@@ -77,4 +77,5 @@
 		<li><a href="http://dev.ckeditor.com/ticket/6253">#6253</a> : BIDI: creating a Numbered/Bulleted list causing improper behavior on bidi.</li>
 		<li><a href="http://dev.ckeditor.com/ticket/4023">#4023</a> : [Opera] Maximize plugin.</li>
+		<li><a href="http://dev.ckeditor.com/ticket/6403">#6403</a> : [Opera] Font name options is not correctly marked in dropdown list.</li>
 		<li><a href="http://dev.ckeditor.com/ticket/6416">#6416</a> : [IE9] Unable to make text selection with mouse in source area.</li>
 		<li><a href="http://dev.ckeditor.com/ticket/6417">#6417</a> : [IE9] Context menu opens at the upper-left corner always.</li>
Index: /CKEditor/trunk/_source/plugins/styles/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/styles/plugin.js	(revision 5971)
+++ /CKEditor/trunk/_source/plugins/styles/plugin.js	(revision 5972)
@@ -1,3 +1,3 @@
-/*
+/*
 Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
 For licensing, see LICENSE.html or http://ckeditor.com/license
@@ -1311,5 +1311,9 @@
 		return styleText.replace( /\s*([;:])\s*/, '$1' )
 							 .replace( /([^\s;])$/, '$1;')
-							 .replace( /,\s+/g, ',' ) // Trimming spaces after comma (e.g. font-family name)(#4107).
+				 			// Trimming spaces after comma(#4107),
+				 			// remove quotations(#6403),
+				 			// mostly for differences on "font-family".
+							 .replace( /,\s+/g, ',' )
+							 .replace( /\"/g,'' )
 							 .toLowerCase();
 	}