diff --git a/wp-admin/admin-ajax.php b/wp-admin/admin-ajax.php
index d2a8d4d20c..92ece70c39 100644
--- a/wp-admin/admin-ajax.php
+++ b/wp-admin/admin-ajax.php
@@ -916,7 +916,7 @@ case 'autosave' : // The name of this action is hardcoded in edit_post()
 	$do_autosave = (bool) $_POST['autosave'];
 	$do_lock = true;
 
-	$data = '';
+	$data = $alert = '';
 	/* translators: draft saved date format, see http://php.net/date */
 	$draft_saved_date_format = __('g:i:s a');
 	/* translators: %s: date and time */
@@ -924,7 +924,7 @@ case 'autosave' : // The name of this action is hardcoded in edit_post()
 
 	$supplemental = array();
 	if ( isset($login_grace_period) )
-		$supplemental['session_expired'] = add_query_arg( 'interim-login', 1, wp_login_url() );
+		$alert .= sprintf( __('Your login has expired. Please open a new browser window and <a href="%s" target="_blank">login again</a>. '), add_query_arg( 'interim-login', 1, wp_login_url() ) );
 
 	$id = $revision_id = 0;
 
@@ -939,12 +939,10 @@ case 'autosave' : // The name of this action is hardcoded in edit_post()
 
 		$last_user = get_userdata( $last );
 		$last_user_name = $last_user ? $last_user->display_name : __( 'Someone' );
-		$data = new WP_Error( 'locked', sprintf(
-			$_POST['post_type'] == 'page' ? __( 'Autosave disabled: %s is currently editing this page.' ) : __( 'Autosave disabled: %s is currently editing this post.' ),
-			esc_html( $last_user_name )
-		) );
+		$data = __( 'Autosave disabled.' );
 
 		$supplemental['disable_autosave'] = 'disable';
+		$alert .= sprintf( __( '%s is currently editing this article. If you update it, you will overwrite the changes.' ), esc_html( $last_user_name ) );
 	}
 
 	if ( 'page' == $post->post_type ) {
@@ -990,6 +988,9 @@ case 'autosave' : // The name of this action is hardcoded in edit_post()
 		}
 	}
 
+	if ( ! empty($alert) )
+		$supplemental['alert'] = $alert;
+
 	$x = new WP_Ajax_Response( array(
 		'what' => 'autosave',
 		'id' => $id,
diff --git a/wp-includes/js/autosave.dev.js b/wp-includes/js/autosave.dev.js
index 0099a9cf3a..133334040a 100644
--- a/wp-includes/js/autosave.dev.js
+++ b/wp-includes/js/autosave.dev.js
@@ -1,4 +1,4 @@
-var autosave, autosaveLast = '', autosavePeriodical, autosaveOldMessage = '', autosaveDelayPreview = false, notSaved = true, blockSave = false, interimLogin = false;
+var autosave, autosaveLast = '', autosavePeriodical, autosaveOldMessage = '', autosaveDelayPreview = false, notSaved = true, blockSave = false;
 
 jQuery(document).ready( function($) {
 	var dotabkey = true;
@@ -83,7 +83,7 @@ jQuery(document).ready( function($) {
 });
 
 function autosave_parse_response(response) {
-	var res = wpAjax.parseAjaxResponse(response, 'autosave'), message = '', postID, sup, url;
+	var res = wpAjax.parseAjaxResponse(response, 'autosave'), message = '', postID, sup;
 
 	if ( res && res.responses && res.responses.length ) {
 		message = res.responses[0].data; // The saved message or error.
@@ -94,13 +94,13 @@ function autosave_parse_response(response) {
 				autosave = function() {};
 				res = { errors: true };
 			}
-			if ( sup['session_expired'] && (url = sup['session_expired']) ) {
-				if ( !interimLogin || interimLogin.closed ) {
-					interimLogin = window.open(url, 'login', 'width=600,height=450,resizable=yes,scrollbars=yes,status=yes');
-					interimLogin.focus();
-				}
-				delete sup['session_expired'];
+
+			if ( sup['alert'] ) {
+				jQuery('#autosave-alert').remove();
+				jQuery('#titlediv').after('<div id="autosave-alert" class="error below-h2"><p>' + sup['alert'] + '</p></div>');
+				alert( jQuery('#autosave-alert').text() );
 			}
+
 			jQuery.each(sup, function(selector, value) {
 				if ( selector.match(/^replace-/) ) {
 					jQuery('#'+selector.replace('replace-', '')).val(value);
@@ -131,7 +131,7 @@ function autosave_saved(response) {
 // called when autosaving new post
 function autosave_saved_new(response) {
 	blockSave = false;
-	var res = autosave_parse_response(response), tempID, postID;
+	var res = autosave_parse_response(response), postID;
 	if ( res && res.responses.length && !res.errors ) {
 		// An ID is sent only for real auto-saves, not for autosave=0 "keepalive" saves
 		postID = parseInt( res.responses[0].id, 10 );
diff --git a/wp-includes/js/autosave.js b/wp-includes/js/autosave.js
index 61ef0c5f17..0fde21300a 100644
--- a/wp-includes/js/autosave.js
+++ b/wp-includes/js/autosave.js
@@ -1 +1 @@
-var autosave,autosaveLast="",autosavePeriodical,autosaveOldMessage="",autosaveDelayPreview=false,notSaved=true,blockSave=false,interimLogin=false;jQuery(document).ready(function(b){var a=true;autosaveLast=b("#post #title").val()+b("#post #content").val();autosavePeriodical=b.schedule({time:autosaveL10n.autosaveInterval*1000,func:function(){autosave()},repeat:true,protect:true});b("#post").submit(function(){b.cancel(autosavePeriodical)});b('input[type="submit"], a.submitdelete',"#submitpost").click(function(){blockSave=true;window.onbeforeunload=null;b(":button, :submit","#submitpost").each(function(){var c=b(this);if(c.hasClass("button-primary")){c.addClass("button-primary-disabled")}else{c.addClass("button-disabled")}});if(b(this).attr("id")=="publish"){b("#ajax-loading").css("visibility","visible")}else{b("#draft-ajax-loading").css("visibility","visible")}});window.onbeforeunload=function(){var c=typeof(tinyMCE)!="undefined"?tinyMCE.activeEditor:false,e,d;if(c&&!c.isHidden()){if(c.isDirty()){return autosaveL10n.saveAlert}}else{e=b("#post #title").val(),d=b("#post #content").val();if((e||d)&&e+d!=autosaveLast){return autosaveL10n.saveAlert}}};b("#post-preview").click(function(){if(b("#auto_draft").val()=="1"&&notSaved){autosaveDelayPreview=true;autosave();return false}doPreview();return false});doPreview=function(){b("input#wp-preview").val("dopreview");b("form#post").attr("target","wp-preview").submit().attr("target","");b("input#wp-preview").val("")};if(typeof tinyMCE!="undefined"){b("#title")[b.browser.opera?"keypress":"keydown"](function(c){if(c.which==9&&!c.shiftKey&&!c.controlKey&&!c.altKey){if((b("#auto_draft").val()=="1")&&(b("#title").val().length>0)){autosave()}if(tinyMCE.activeEditor&&!tinyMCE.activeEditor.isHidden()&&a){c.preventDefault();a=false;tinyMCE.activeEditor.focus();return false}}})}if("1"==b("#auto_draft").val()){b("#title").blur(function(){if(!this.value||b("#auto_draft").val()!="1"){return}delayed_autosave()})}});function autosave_parse_response(c){var e=wpAjax.parseAjaxResponse(c,"autosave"),f="",a,b,d;if(e&&e.responses&&e.responses.length){f=e.responses[0].data;if(e.responses[0].supplemental){b=e.responses[0].supplemental;if("disable"==b.disable_autosave){autosave=function(){};e={errors:true}}if(b.session_expired&&(d=b.session_expired)){if(!interimLogin||interimLogin.closed){interimLogin=window.open(d,"login","width=600,height=450,resizable=yes,scrollbars=yes,status=yes");interimLogin.focus()}delete b.session_expired}jQuery.each(b,function(g,h){if(g.match(/^replace-/)){jQuery("#"+g.replace("replace-","")).val(h)}})}if(!e.errors){a=parseInt(e.responses[0].id,10);if(!isNaN(a)&&a>0){autosave_update_slug(a)}}}if(f){jQuery("#autosave").html(f)}else{if(autosaveOldMessage&&e){jQuery("#autosave").html(autosaveOldMessage)}}return e}function autosave_saved(a){blockSave=false;autosave_parse_response(a);autosave_enable_buttons()}function autosave_saved_new(b){blockSave=false;var d=autosave_parse_response(b),c,a;if(d&&d.responses.length&&!d.errors){a=parseInt(d.responses[0].id,10);if(!isNaN(a)&&a>0){notSaved=false;jQuery("#auto_draft").val("0")}autosave_enable_buttons();if(autosaveDelayPreview){autosaveDelayPreview=false;doPreview()}}else{autosave_enable_buttons()}}function autosave_update_slug(a){if("undefined"!=makeSlugeditClickable&&jQuery.isFunction(makeSlugeditClickable)&&!jQuery("#edit-slug-box > *").size()){jQuery.post(ajaxurl,{action:"sample-permalink",post_id:a,new_title:jQuery("#title").val(),samplepermalinknonce:jQuery("#samplepermalinknonce").val()},function(b){if(b!=="-1"){jQuery("#edit-slug-box").html(b);makeSlugeditClickable()}})}}function autosave_loading(){jQuery("#autosave").html(autosaveL10n.savingText)}function autosave_enable_buttons(){setTimeout(function(){jQuery(":button, :submit","#submitpost").removeAttr("disabled");jQuery(".ajax-loading").css("visibility","hidden")},500)}function autosave_disable_buttons(){jQuery(":button, :submit","#submitpost").attr("disabled","disabled");setTimeout(autosave_enable_buttons,5000)}function delayed_autosave(){setTimeout(function(){if(blockSave){return}autosave()},200)}autosave=function(){blockSave=true;var c=(typeof tinyMCE!="undefined")&&tinyMCE.activeEditor&&!tinyMCE.activeEditor.isHidden(),d,f,b,e,a;autosave_disable_buttons();d={action:"autosave",post_ID:jQuery("#post_ID").val()||0,post_title:jQuery("#title").val()||"",autosavenonce:jQuery("#autosavenonce").val(),post_type:jQuery("#post_type").val()||"",autosave:1};jQuery(".tags-input").each(function(){d[this.name]=this.value});f=true;if(jQuery("#TB_window").css("display")=="block"){f=false}if(c&&f){b=tinyMCE.activeEditor;if(b.plugins.spellchecker&&b.plugins.spellchecker.active){f=false}else{if("mce_fullscreen"==b.id){tinyMCE.get("content").setContent(b.getContent({format:"raw"}),{format:"raw"})}tinyMCE.get("content").save()}}d.content=jQuery("#content").val();if(jQuery("#post_name").val()){d.post_name=jQuery("#post_name").val()}if((d.post_title.length==0&&d.content.length==0)||d.post_title+d.content==autosaveLast){f=false}e=jQuery("#original_post_status").val();goodcats=([]);jQuery("[name='post_category[]']:checked").each(function(g){goodcats.push(this.value)});d.catslist=goodcats.join(",");if(jQuery("#comment_status").attr("checked")){d.comment_status="open"}if(jQuery("#ping_status").attr("checked")){d.ping_status="open"}if(jQuery("#excerpt").size()){d.excerpt=jQuery("#excerpt").val()}if(jQuery("#post_author").size()){d.post_author=jQuery("#post_author").val()}if(jQuery("#parent_id").val()){d.parent_id=jQuery("#parent_id").val()}d.user_ID=jQuery("#user-id").val();if(jQuery("#auto_draft").val()=="1"){d.auto_draft="1"}if(f){autosaveLast=jQuery("#title").val()+jQuery("#content").val()}else{d.autosave=0}if(d.auto_draft=="1"){a=autosave_saved_new}else{a=autosave_saved}autosaveOldMessage=jQuery("#autosave").html();jQuery.ajax({data:d,beforeSend:f?autosave_loading:null,type:"POST",url:autosaveL10n.requestFile,success:a})};
\ No newline at end of file
+var autosave,autosaveLast="",autosavePeriodical,autosaveOldMessage="",autosaveDelayPreview=false,notSaved=true,blockSave=false;jQuery(document).ready(function(b){var a=true;autosaveLast=b("#post #title").val()+b("#post #content").val();autosavePeriodical=b.schedule({time:autosaveL10n.autosaveInterval*1000,func:function(){autosave()},repeat:true,protect:true});b("#post").submit(function(){b.cancel(autosavePeriodical)});b('input[type="submit"], a.submitdelete',"#submitpost").click(function(){blockSave=true;window.onbeforeunload=null;b(":button, :submit","#submitpost").each(function(){var c=b(this);if(c.hasClass("button-primary")){c.addClass("button-primary-disabled")}else{c.addClass("button-disabled")}});if(b(this).attr("id")=="publish"){b("#ajax-loading").css("visibility","visible")}else{b("#draft-ajax-loading").css("visibility","visible")}});window.onbeforeunload=function(){var c=typeof(tinyMCE)!="undefined"?tinyMCE.activeEditor:false,e,d;if(c&&!c.isHidden()){if(c.isDirty()){return autosaveL10n.saveAlert}}else{e=b("#post #title").val(),d=b("#post #content").val();if((e||d)&&e+d!=autosaveLast){return autosaveL10n.saveAlert}}};b("#post-preview").click(function(){if(b("#auto_draft").val()=="1"&&notSaved){autosaveDelayPreview=true;autosave();return false}doPreview();return false});doPreview=function(){b("input#wp-preview").val("dopreview");b("form#post").attr("target","wp-preview").submit().attr("target","");b("input#wp-preview").val("")};if(typeof tinyMCE!="undefined"){b("#title")[b.browser.opera?"keypress":"keydown"](function(c){if(c.which==9&&!c.shiftKey&&!c.controlKey&&!c.altKey){if((b("#auto_draft").val()=="1")&&(b("#title").val().length>0)){autosave()}if(tinyMCE.activeEditor&&!tinyMCE.activeEditor.isHidden()&&a){c.preventDefault();a=false;tinyMCE.activeEditor.focus();return false}}})}if("1"==b("#auto_draft").val()){b("#title").blur(function(){if(!this.value||b("#auto_draft").val()!="1"){return}delayed_autosave()})}});function autosave_parse_response(c){var d=wpAjax.parseAjaxResponse(c,"autosave"),e="",a,b;if(d&&d.responses&&d.responses.length){e=d.responses[0].data;if(d.responses[0].supplemental){b=d.responses[0].supplemental;if("disable"==b.disable_autosave){autosave=function(){};d={errors:true}}if(b.alert){jQuery("#autosave-alert").remove();jQuery("#titlediv").after('<div id="autosave-alert" class="error below-h2"><p>'+b.alert+"</p></div>");alert(jQuery("#autosave-alert").text())}jQuery.each(b,function(f,g){if(f.match(/^replace-/)){jQuery("#"+f.replace("replace-","")).val(g)}})}if(!d.errors){a=parseInt(d.responses[0].id,10);if(!isNaN(a)&&a>0){autosave_update_slug(a)}}}if(e){jQuery("#autosave").html(e)}else{if(autosaveOldMessage&&d){jQuery("#autosave").html(autosaveOldMessage)}}return d}function autosave_saved(a){blockSave=false;autosave_parse_response(a);autosave_enable_buttons()}function autosave_saved_new(b){blockSave=false;var c=autosave_parse_response(b),a;if(c&&c.responses.length&&!c.errors){a=parseInt(c.responses[0].id,10);if(!isNaN(a)&&a>0){notSaved=false;jQuery("#auto_draft").val("0")}autosave_enable_buttons();if(autosaveDelayPreview){autosaveDelayPreview=false;doPreview()}}else{autosave_enable_buttons()}}function autosave_update_slug(a){if("undefined"!=makeSlugeditClickable&&jQuery.isFunction(makeSlugeditClickable)&&!jQuery("#edit-slug-box > *").size()){jQuery.post(ajaxurl,{action:"sample-permalink",post_id:a,new_title:jQuery("#title").val(),samplepermalinknonce:jQuery("#samplepermalinknonce").val()},function(b){if(b!=="-1"){jQuery("#edit-slug-box").html(b);makeSlugeditClickable()}})}}function autosave_loading(){jQuery("#autosave").html(autosaveL10n.savingText)}function autosave_enable_buttons(){setTimeout(function(){jQuery(":button, :submit","#submitpost").removeAttr("disabled");jQuery(".ajax-loading").css("visibility","hidden")},500)}function autosave_disable_buttons(){jQuery(":button, :submit","#submitpost").attr("disabled","disabled");setTimeout(autosave_enable_buttons,5000)}function delayed_autosave(){setTimeout(function(){if(blockSave){return}autosave()},200)}autosave=function(){blockSave=true;var c=(typeof tinyMCE!="undefined")&&tinyMCE.activeEditor&&!tinyMCE.activeEditor.isHidden(),d,f,b,e,a;autosave_disable_buttons();d={action:"autosave",post_ID:jQuery("#post_ID").val()||0,post_title:jQuery("#title").val()||"",autosavenonce:jQuery("#autosavenonce").val(),post_type:jQuery("#post_type").val()||"",autosave:1};jQuery(".tags-input").each(function(){d[this.name]=this.value});f=true;if(jQuery("#TB_window").css("display")=="block"){f=false}if(c&&f){b=tinyMCE.activeEditor;if(b.plugins.spellchecker&&b.plugins.spellchecker.active){f=false}else{if("mce_fullscreen"==b.id){tinyMCE.get("content").setContent(b.getContent({format:"raw"}),{format:"raw"})}tinyMCE.get("content").save()}}d.content=jQuery("#content").val();if(jQuery("#post_name").val()){d.post_name=jQuery("#post_name").val()}if((d.post_title.length==0&&d.content.length==0)||d.post_title+d.content==autosaveLast){f=false}e=jQuery("#original_post_status").val();goodcats=([]);jQuery("[name='post_category[]']:checked").each(function(g){goodcats.push(this.value)});d.catslist=goodcats.join(",");if(jQuery("#comment_status").attr("checked")){d.comment_status="open"}if(jQuery("#ping_status").attr("checked")){d.ping_status="open"}if(jQuery("#excerpt").size()){d.excerpt=jQuery("#excerpt").val()}if(jQuery("#post_author").size()){d.post_author=jQuery("#post_author").val()}if(jQuery("#parent_id").val()){d.parent_id=jQuery("#parent_id").val()}d.user_ID=jQuery("#user-id").val();if(jQuery("#auto_draft").val()=="1"){d.auto_draft="1"}if(f){autosaveLast=jQuery("#title").val()+jQuery("#content").val()}else{d.autosave=0}if(d.auto_draft=="1"){a=autosave_saved_new}else{a=autosave_saved}autosaveOldMessage=jQuery("#autosave").html();jQuery.ajax({data:d,beforeSend:f?autosave_loading:null,type:"POST",url:autosaveL10n.requestFile,success:a})};
\ No newline at end of file
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index e0209e4bf2..c6a7ec7a5d 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -103,7 +103,7 @@ function wp_default_scripts( &$scripts ) {
 		'l10n_print_after' => 'try{convertEntities(wpAjax);}catch(e){};'
 	) );
 
-	$scripts->add( 'autosave', "/wp-includes/js/autosave$suffix.js", array('schedule', 'wp-ajax-response'), '20110327' );
+	$scripts->add( 'autosave', "/wp-includes/js/autosave$suffix.js", array('schedule', 'wp-ajax-response'), '20110415' );
 	$scripts->add_data( 'autosave', 'group', 1 );
 
 	$scripts->add( 'wp-lists', "/wp-includes/js/wp-lists$suffix.js", array('wp-ajax-response'), '20101222' );