Index: /CKEditor/trunk/_source/plugins/sourcearea/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/sourcearea/plugin.js	(revision 3494)
+++ /CKEditor/trunk/_source/plugins/sourcearea/plugin.js	(revision 3495)
@@ -72,5 +72,10 @@
 									onResize = function()
 										{
+											// Holder rectange size is stretched by textarea, 
+											// so hide it just for a moment.
+											textarea.hide();
 											textarea.setStyles( getHolderRect() );
+											// When we have proper holder size, show textarea again.
+											textarea.show();
 										};
 									styles = CKEDITOR.tools.extend( styles, getHolderRect(), true );