diff --git a/e107_admin/boot.php b/e107_admin/boot.php
index 1fb02e2f0..8d0e393fb 100644
--- a/e107_admin/boot.php
+++ b/e107_admin/boot.php
@@ -80,7 +80,7 @@ if(e_AJAX_REQUEST && getperms('0') &&  varset($_GET['mode']) == 'addons' && ($_G
 	$tp = e107::getParser();
 	$ns->setUniqueId('e-addon-updates');
 	$ns->setStyle('warning');
-	$ret = $ns->tablerender($tp->toGlyph('fa-arrow-circle-o-down').LAN_UPDATE_AVAILABLE,$text,'default', true);
+	$ret = $ns->tablerender($tp->toGlyph('fa-arrow-circle-o-down').defset('LAN_UPDATE_AVAILABLE'),$text,'default', true);
 
 	echo $ret;
 
@@ -292,7 +292,7 @@ function admin_purge_related($table, $id)
 	$num = $_com->delete_comments($table, $id);
 	if ($num)
 	{
-		$msg .= $num." ".LAN_COMMENTS." ".LAN_DELETED."<br />";
+		$msg .= $num." ".LAN_COMMENTS." ".defset('LAN_DELETED', 'Deleted')."<br />";
 	}
 
 	// Delete any related ratings
@@ -301,7 +301,7 @@ function admin_purge_related($table, $id)
 	$num = $_rate->delete_ratings($table, $id);
 	if ($num)
 	{
-		$msg .= LAN_RATING." ".LAN_DELETED."<br />";
+		$msg .= LAN_RATING." ".defset('LAN_DELETED', 'Deleted')."<br />";
 	}
 
 	if ($msg)
diff --git a/e107_admin/db.php b/e107_admin/db.php
index fa25df0ab..197be6898 100644
--- a/e107_admin/db.php
+++ b/e107_admin/db.php
@@ -422,6 +422,8 @@ class system_tools
 		e107::getRender()->tablerender(DBLAN_10.SEP.DBLAN_112, e107::getMessage()->render());
 
 		e107::getCache()->clearAll('system');
+		e107::getSession()->clear('core-update-status'); // true when the update alert should be displayed.
+		e107::getSession()->clear('core-update-checked'); // if the update check has been performed already or not.
 
 	}
 
diff --git a/e107_admin/update_routines.php b/e107_admin/update_routines.php
index f30366cd1..14b686e49 100644
--- a/e107_admin/update_routines.php
+++ b/e107_admin/update_routines.php
@@ -654,6 +654,11 @@ function update_core_database($type = '')
 
 		}
 
+		if(!isset($pref['admin_navbar_debug']))
+		{
+			return update_needed("Upgrade to 2.4 required (install skin).");
+		}
+
 		if(!isset($pref['lan_global_list']['news']))
 		{
 			if($just_check)
diff --git a/e107_handlers/cron_class.php b/e107_handlers/cron_class.php
index 0eb14d215..73cd438b3 100644
--- a/e107_handlers/cron_class.php
+++ b/e107_handlers/cron_class.php
@@ -83,6 +83,8 @@ class _system_cron
 		e107::getCache()->clearAll('js');
 		e107::getCache()->clearAll('library');
 		e107::getCache()->clearAll('browser');
+		e107::getSession()->clear('core-update-status'); // true when the update alert should be displayed.
+		e107::getSession()->clear('core-update-checked'); // true if the update check has been performed already. false if not. 
 	}