Index: _whatsnew.html
===================================================================
--- _whatsnew.html	(revision 1455)
+++ _whatsnew.html	(working copy)
@@ -71,6 +71,8 @@
 			is now enforced only when ForcePasteAsPlainText = true.</li>
 		<li>[<a target="_blank" href="http://dev.fckeditor.net/ticket/1336">#1336</a>] Sometimes
 			the autogrow plugin didn't work properly in Firefox.</li>
+		<li>[<a target="_blank" href="http://dev.fckeditor.net/ticket/1782">#1782</a>] Clicking on radio
+			buttons or checkboxes in the editor in IE will no longer cause lockups in IE.</li>
 	</ul>
 	<p>
 		<a href="_whatsnew_history.html">See previous versions history</a>
Index: editor/_source/internals/fck_ie.js
===================================================================
--- editor/_source/internals/fck_ie.js	(revision 1455)
+++ editor/_source/internals/fck_ie.js	(working copy)
@@ -138,6 +138,8 @@
 	
 	// Catch cursor selection changes.
 	this.EditorDocument.attachEvent("onselectionchange", Doc_OnSelectionChange ) ;
+
+	FCKTools.AddEventListener( FCK.EditorDocument, 'mousedown', Doc_OnMouseDown ) ;
 }
 
 FCK.InsertHtml = function( html )
@@ -430,3 +432,22 @@
 
 	return aCreatedLinks ;
 }
+
+function _FCK_RemoveDisabledAtt()
+{
+	this.removeAttribute( 'disabled' ) ;
+}
+
+function Doc_OnMouseDown( evt )
+{
+	var e = evt.srcElement ;
+
+	// Radio buttons and checkboxes should not be allowed to be triggered in IE
+	// in editable mode. Otherwise the whole browser window may be locked by
+	// the buttons. (#1782)
+	if ( e.nodeName.IEquals( 'input' ) && e.type.IEquals( ['radio', 'checkbox'] ) && !e.disabled )
+	{
+		e.disabled = true ;
+		FCKTools.SetTimeout( _FCK_RemoveDisabledAtt, 1, e ) ;
+	}
+}