Index: /CKEditor/trunk/_source/plugins/scayt/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/scayt/plugin.js	(revision 3737)
+++ /CKEditor/trunk/_source/plugins/scayt/plugin.js	(revision 3738)
@@ -312,31 +312,35 @@
 				});
 
-			editor.ui.add( 'Scayt', CKEDITOR.UI_MENUBUTTON,
-				{
-					label : editor.lang.scayt.title,
-					title : editor.lang.scayt.title,
-					className : 'cke_button_scayt',
-					onRender: function()
-					{
-						command.on( 'state', function()
-							{
-								this.setState( command.state );
-							},
-							this);
-					},
-					onMenu : function()
-					{
-						var isEnabled = plugin.isScaytEnabled( editor );
-
-						editor.getMenuItem( 'scaytToggle' ).label = editor.lang.scayt[ isEnabled ? 'disable' : 'enable' ];
-
-						return {
-							scaytToggle : CKEDITOR.TRISTATE_OFF,
-							scaytOptions : isEnabled ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED,
-							scaytLangs : isEnabled ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED,
-							scaytAbout : isEnabled ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED
-						};
-					}
-				});
+			// Disabling it on IE for now, as it's blocking the browser (#3802).
+			if ( !CKEDITOR.env.ie )
+			{
+				editor.ui.add( 'Scayt', CKEDITOR.UI_MENUBUTTON,
+					{
+						label : editor.lang.scayt.title,
+						title : editor.lang.scayt.title,
+						className : 'cke_button_scayt',
+						onRender: function()
+						{
+							command.on( 'state', function()
+								{
+									this.setState( command.state );
+								},
+								this);
+						},
+						onMenu : function()
+						{
+							var isEnabled = plugin.isScaytEnabled( editor );
+
+							editor.getMenuItem( 'scaytToggle' ).label = editor.lang.scayt[ isEnabled ? 'disable' : 'enable' ];
+
+							return {
+								scaytToggle : CKEDITOR.TRISTATE_OFF,
+								scaytOptions : isEnabled ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED,
+								scaytLangs : isEnabled ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED,
+								scaytAbout : isEnabled ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED
+							};
+						}
+					});
+			}
 
 			// If the "contextmenu" plugin is loaded, register the listeners.