Index: CKEditor/trunk/_source/plugins/floatpanel/plugin.js
===================================================================
--- CKEditor/trunk/_source/plugins/floatpanel/plugin.js	(revision 6940)
+++ CKEditor/trunk/_source/plugins/floatpanel/plugin.js	(revision 6941)
@@ -224,5 +224,5 @@
 								// (#3426)
 								if ( CKEDITOR.env.ie && CKEDITOR.env.quirks && width > 0 )
-									width += ( target.$.offsetWidth || 0 ) - ( target.$.clientWidth || 0 );
+									width += ( target.$.offsetWidth || 0 ) - ( target.$.clientWidth || 0 ) + 3;
 								// A little extra at the end.
 								// If not present, IE6 might break into the next line, but also it looks better this way
@@ -240,5 +240,5 @@
 								// (#3426)
 								if ( CKEDITOR.env.ie && CKEDITOR.env.quirks && height > 0 )
-									height += ( target.$.offsetHeight || 0 ) - ( target.$.clientHeight || 0 );
+									height += ( target.$.offsetHeight || 0 ) - ( target.$.clientHeight || 0 ) + 3;
 
 								target.setStyle( 'height', height + 'px' );