Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 7660)
+++ /CKEditor/trunk/CHANGES.html	(revision 7661)
@@ -40,5 +40,5 @@
 			New features:</p>
 	<ul>
-		<li></li>
+		<li><a href="http://dev.ckeditor.com/ticket/9483">#9483</a> : [IE10] Fixed script error on float panel opening.</li>
 	</ul>
 	<p>
Index: /CKEditor/trunk/_source/plugins/floatpanel/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/floatpanel/plugin.js	(revision 7660)
+++ /CKEditor/trunk/_source/plugins/floatpanel/plugin.js	(revision 7661)
@@ -208,14 +208,7 @@
 							if ( block.autoSize )
 							{
-								// We must adjust first the width or IE6 could include extra lines in the height computation
-								var widthNode = block.element.$;
-
-								if ( CKEDITOR.env.gecko || CKEDITOR.env.opera )
-									widthNode = widthNode.parentNode;
-
-								if ( CKEDITOR.env.ie )
-									widthNode = widthNode.document.body;
-
-								var width = widthNode.scrollWidth;
+								var panelDoc = block.element.getDocument();
+								var width = ( CKEDITOR.env.webkit? block.element : panelDoc.getBody() )[ '$' ].scrollWidth;
+
 								// Account for extra height needed due to IE quirks box model bug:
 								// http://en.wikipedia.org/wiki/Internet_Explorer_box_model_bug