diff --git a/models/Dispatcher.php b/models/Dispatcher.php
index a1c37859..e7554998 100644
--- a/models/Dispatcher.php
+++ b/models/Dispatcher.php
@@ -114,10 +114,10 @@ class Dispatcher
 	/**
 	 * Kicks a guest to a login form, redirecting them back to this page upon login.
 	 */
-	public static function kickGuest()
+	public static function kickGuest($title = null, $message = null)
 	{
 		$form = new LogInForm('Log in');
-		$form->adopt(new Alert('', 'You need to be logged in to view this page.', 'error'));
+		$form->adopt(new Alert($title ?? '', $message ?? 'You need to be logged in to view this page.', 'error'));
 		$form->setRedirectUrl($_SERVER['REQUEST_URI']);
 
 		$page = new MainTemplate('Login required');
diff --git a/models/Session.php b/models/Session.php
index 648439e0..22e08448 100644
--- a/models/Session.php
+++ b/models/Session.php
@@ -19,13 +19,13 @@ class Session
 			if (!isset($_SERVER['HTTPS']) && isset($_SERVER['REMOTE_ADDR']) && $_SESSION['ip_address'] !== $_SERVER['REMOTE_ADDR'])
 			{
 				$_SESSION = [];
-				throw new UserFacingException('Your session failed to validate: your IP address has changed. Please re-login and try again.');
+				Dispatcher::kickGuest('Your session failed to validate', 'Your IP address has changed. Please re-login and try again.');
 			}
 			// Either way, require re-login if the browser identifier has changed.
 			elseif (isset($_SERVER['HTTP_USER_AGENT']) && $_SESSION['user_agent'] !== $_SERVER['HTTP_USER_AGENT'])
 			{
 				$_SESSION = [];
-				throw new UserFacingException('Your session failed to validate: your browser identifier has changed. Please re-login and try again.');
+				Dispatcher::kickGuest('Your session failed to validate', 'Your browser identifier has changed. Please re-login and try again.');
 			}
 		}
 		elseif (!isset($_SESSION['ip_address'], $_SESSION['user_agent']))
diff --git a/public/css/default.css b/public/css/default.css
index 861d2577..ce28dada 100644
--- a/public/css/default.css
+++ b/public/css/default.css
@@ -437,6 +437,7 @@ textarea {
 	width: 100%;
 }
 #login div.alert {
+	line-height: normal;
 	margin: 15px 0;
 }
 #login div.buttonstrip {