Index: /CKEditor/trunk/_source/plugins/floatpanel/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/floatpanel/plugin.js	(revision 3481)
+++ /CKEditor/trunk/_source/plugins/floatpanel/plugin.js	(revision 3482)
@@ -183,5 +183,12 @@
 
 							if ( !CKEDITOR.env.gecko || panel.isLoaded )
-								setHeight();
+							{
+								// IE7 needs some time (setting the delay to 0ms won't work) to refresh
+								// the scrollHeight. (#3174)
+								if ( CKEDITOR.env.ie && CKEDITOR.env.version >= 7 )
+									setTimeout( setHeight, 50 );
+								else
+									setHeight();
+							}
 							else
 								panel.onLoad = setHeight;