diff --git a/admin/javascript/LeftAndMain.js b/admin/javascript/LeftAndMain.js
index 7ae70881c..c63787bd0 100644
--- a/admin/javascript/LeftAndMain.js
+++ b/admin/javascript/LeftAndMain.js
@@ -188,7 +188,7 @@ jQuery.noConflict();
 			}
 
 			// Show message (but ignore aborted requests)
-			if(xhr.status !== 0 && msg && $.inArray(msg, ignoredMessages)) {
+			if(xhr.status !== 0 && msg && $.inArray(msg, ignoredMessages) === -1) {
 				// Decode into UTF-8, HTTP headers don't allow multibyte
 				statusMessage(decodeURIComponent(msg), msgType);
 			}
@@ -261,7 +261,7 @@ jQuery.noConflict();
 
 			fromWindow: {
 				onstatechange: function(e){
-					this.handleStateChange(e);
+					this.handleStateChange(e); 
 				}
 			},
 
@@ -365,7 +365,7 @@ jQuery.noConflict();
 
 			/**
 			 * Confirm whether the current user can navigate away from this page
-			 *
+			 * 
 			 * @param {array} selectors Optional list of selectors
 			 * @returns {boolean} True if the navigation can proceed
 			 */
@@ -521,7 +521,7 @@ jQuery.noConflict();
 			 * Last html5 history state
 			 */
 			LastState: null,
-
+			
 			/**
 			 * Flag to pause handleStateChange
 			 */
@@ -553,7 +553,7 @@ jQuery.noConflict();
 				if(this.getPauseState()) {
 					return;
 				}
-
+				
 				// Don't allow parallel loading to avoid edge cases
 				if(this.getStateChangeXHR()) this.getStateChangeXHR().abort();
 
@@ -576,12 +576,12 @@ jQuery.noConflict();
 					if(h.emulated.pushState) {
 						return;
 					}
-
+					
 					var lastState = this.getLastState();
-
+					
 					// Suppress panel loading while resetting state
 					this.setPauseState(true);
-
+					
 					// Restore best last state
 					if(lastState) {
 						h.pushState(lastState.id, lastState.title, lastState.url);
@@ -589,7 +589,7 @@ jQuery.noConflict();
 						h.back();
 					}
 					this.setPauseState(false);
-
+					
 					// Abort loading of this panel
 					return;
 				}
diff --git a/model/Versioned.php b/model/Versioned.php
index d342896ed..0b4e720cf 100644
--- a/model/Versioned.php
+++ b/model/Versioned.php
@@ -1478,10 +1478,13 @@ class Versioned extends DataExtension implements TemplateGlobalProvider {
 	 */
 	public function isLatestVersion() {
 		$version = self::get_latest_version($this->owner->class, $this->owner->ID);
-
+		if($version) {
 		return ($version->Version == $this->owner->Version);
 	}
 
+		return false;
+	}
+
 	/**
 	 * Return the equivalent of a DataList::create() call, querying the latest
 	 * version of each page stored in the (class)_versions tables.
diff --git a/security/Security.php b/security/Security.php
index 54e1ffe45..e48ed5db2 100644
--- a/security/Security.php
+++ b/security/Security.php
@@ -275,9 +275,12 @@ class Security extends Controller implements TemplateGlobalProvider {
 			$form = $me->LoginForm();
 			$form->sessionMessage($message, 'warning');
 			Session::set('MemberLoginForm.force_message',1);
-			$formText = $me->login();
+			$loginResponse = $me->login();
+			if($loginResponse instanceof SS_HTTPResponse) {
+				return $loginResponse;
+			}
 
-			$response->setBody($formText);
+			$response->setBody((string)$loginResponse);
 
 			$controller->extend('permissionDenied', $member);
 
@@ -502,7 +505,7 @@ class Security extends Controller implements TemplateGlobalProvider {
 	 * For multiple authenticators, Security_MultiAuthenticatorLogin is used.
 	 * See getTemplatesFor and getIncludeTemplate for how to override template logic
 	 *
-	 * @return string Returns the "login" page as HTML code.
+	 * @return string|SS_HTTPResponse Returns the "login" page as HTML code.
 	 */
 	public function login() {
 		// Check pre-login process
diff --git a/tests/core/manifest/fixtures/configmanifest/mysite/_config/empty.yml b/tests/core/manifest/fixtures/configmanifest/mysite/_config/empty.yml
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/core/manifest/fixtures/configmanifest/mysite/_config/namedempty.yml b/tests/core/manifest/fixtures/configmanifest/mysite/_config/namedempty.yml
new file mode 100644
index 000000000..7ce2d4818
--- /dev/null
+++ b/tests/core/manifest/fixtures/configmanifest/mysite/_config/namedempty.yml
@@ -0,0 +1,3 @@
+---
+Name: emptyconfig
+---