Index: /CKEditor.NET/trunk/CHANGES.html
===================================================================
--- /CKEditor.NET/trunk/CHANGES.html	(revision 7257)
+++ /CKEditor.NET/trunk/CHANGES.html	(revision 7258)
@@ -70,4 +70,12 @@
 	</h1>
 	<h2>
+		CKEditor for ASP.NET 3.6.2 (SVN)
+	</h2>
+	<p>
+			Fixed issues:</p>
+	<ul>
+		<li><a href="http://dev.ckeditor.com/ticket/8089">#8089</a> : Editor disappears on Ajax postback.</li>
+	</ul>	
+	<h2>
 		CKEditor for ASP.NET 3.6.1
 	</h2>
Index: /CKEditor.NET/trunk/CKEditor.NET/CKEditorControl.cs
===================================================================
--- /CKEditor.NET/trunk/CKEditor.NET/CKEditorControl.cs	(revision 7257)
+++ /CKEditor.NET/trunk/CKEditor.NET/CKEditorControl.cs	(revision 7258)
@@ -1031,5 +1031,5 @@
 			// http://msdn.microsoft.com/en-us/library/bb386417.aspx
 			// Check _dev/msajax.js for an uncompressed version (available in CKEditor.Net downloaded from SVN).
-			scriptInit += @"var CKEditor_Controls=[],CKEditor_Init=[];function CKEditor_TextBoxEncode(d,e){var f;if(typeof CKEDITOR=='undefined'||typeof CKEDITOR.instances[d]=='undefined'){f=document.getElementById(d);if(f)f.value=f.value.replace(/</g,'&lt;').replace(/>/g,'&gt;');}else{var g=CKEDITOR.instances[d];if(e){g.destroy();f=document.getElementById(d);if(f)f.style.visibility='hidden';}else g.updateElement();}};(function(){if(typeof CKEDITOR!='undefined'){var d=document.getElementById('" + this.ClientID + @"');if(d)d.style.visibility='hidden';}var e=function(){var f=CKEditor_Controls,g=CKEditor_Init,h=window.pageLoad,i=function(){for(var j=f.length;j--;){var k=document.getElementById(f[j]);if(k&&k.value&&(k.value.indexOf('<')==-1||k.value.indexOf('>')==-1))k.value=k.value.replace(/&lt;/g,'<').replace(/&gt;/g,'>').replace(/&amp;/g,'&');}if(typeof CKEDITOR!='undefined')for(var j=0;j<g.length;j++)g[j].call(this);};window.pageLoad=function(j,k){if(k.get_isPartialLoad())setTimeout(i,0);if(h&&typeof h=='function')h.call(this,j,k);};setTimeout(i,0);};if(window.addEventListener)window.addEventListener('load',e,false);else if(window.attachEvent)window.attachEvent('onload',e);})();";
+			scriptInit += @"var CKEditor_Controls=[],CKEditor_Init=[];function CKEditor_TextBoxEncode(d,e){var f;if(typeof CKEDITOR=='undefined'||typeof CKEDITOR.instances[d]=='undefined'){f=document.getElementById(d);if(f)f.value=f.value.replace(/</g,'&lt;').replace(/>/g,'&gt;');}else{var g=CKEDITOR.instances[d];if(e && Page_IsValid){g.destroy();f=document.getElementById(d);if(f)f.style.visibility='hidden';}else g.updateElement();}};(function(){if(typeof CKEDITOR!='undefined'){var d=document.getElementById('" + this.ClientID + @"');if(d)d.style.visibility='hidden';}var e=function(){var f=CKEditor_Controls,g=CKEditor_Init,h=window.pageLoad,i=function(){for(var j=f.length;j--;){var k=document.getElementById(f[j]);if(k&&k.value&&(k.value.indexOf('<')==-1||k.value.indexOf('>')==-1))k.value=k.value.replace(/&lt;/g,'<').replace(/&gt;/g,'>').replace(/&amp;/g,'&');}if(typeof CKEDITOR!='undefined')for(var j=0;j<g.length;j++)g[j].call(this);};window.pageLoad=function(j,k){if(k.get_isPartialLoad())setTimeout(i,0);if(h&&typeof h=='function')h.call(this,j,k);};setTimeout(i,0);};if(window.addEventListener)window.addEventListener('load',e,false);else if(window.attachEvent)window.attachEvent('onload',e);})();";
 			this.RegisterStartupScript(this.GetType(), "CKEditorForNet", scriptInit, true);
 			this.RegisterStartupScript(this.GetType(), this.ClientID + @"_addControl", string.Format(@"CKEditor_Controls.push('{0}');
Index: /CKEditor.NET/trunk/_dev/msajax.js
===================================================================
--- /CKEditor.NET/trunk/_dev/msajax.js	(revision 7257)
+++ /CKEditor.NET/trunk/_dev/msajax.js	(revision 7258)
@@ -17,5 +17,5 @@
 	else {
 		var e = CKEDITOR.instances[cID];
-		if (inUpdatePanel) {
+		if (inUpdatePanel && Page_IsValid) {
 			e.destroy();
 			control = document.getElementById(cID);