diff --git a/libraries/joomla/table/asset.php b/libraries/joomla/table/asset.php
index 37b8ddca433f5..01910f862badb 100644
--- a/libraries/joomla/table/asset.php
+++ b/libraries/joomla/table/asset.php
@@ -99,6 +99,10 @@ public function check()
 	{
 		$this->parent_id = (int) $this->parent_id;
 
+		if (empty($this->rules))
+		{
+			$this->rules = '{}';
+		}
 		// JTableNested does not allow parent_id = 0, override this.
 		if ($this->parent_id > 0)
 		{
@@ -118,10 +122,7 @@ public function check()
 				$this->setError('Invalid Parent ID');
 
 				return false;
-			}
-			if (empty($this->rules))
-			{
-				$this->rules = '{}';
+
 			}
 		}
 
diff --git a/libraries/legacy/table/category.php b/libraries/legacy/table/category.php
index be8a1e36cb4d1..506a6e0ad9204 100644
--- a/libraries/legacy/table/category.php
+++ b/libraries/legacy/table/category.php
@@ -227,7 +227,7 @@ public function store($updateNulls = false)
 		// Verify that the alias is unique
 		$table = JTable::getInstance('Category', 'JTable', array('dbo' => $this->getDbo()));
 
-		if ($table->load(array('alias' => $this->alias, 'parent_id' => $this->parent_id, 'extension' => $this->extension))
+		if ($table->load(array('alias' => $this->alias, 'parent_id' => (int) $this->parent_id, 'extension' => $this->extension))
 			&& ($table->id != $this->id || $this->id == 0))
 		{
 			$this->setError(JText::_('JLIB_DATABASE_ERROR_CATEGORY_UNIQUE_ALIAS'));
diff --git a/libraries/legacy/table/menu.php b/libraries/legacy/table/menu.php
index 238cae7e8f3a3..747ca19aeb598 100644
--- a/libraries/legacy/table/menu.php
+++ b/libraries/legacy/table/menu.php
@@ -111,6 +111,22 @@ public function check()
 			$this->alias = $this->title;
 		}
 
+		// Check for a path.
+		if (trim($this->path) == '')
+		{
+			$this->path = $this->alias;
+		}
+		// Check for params.
+		if (trim($this->params) == '')
+		{
+			$this->params = '{}';
+		}
+		// Check for img.
+		if (trim($this->img) == '')
+		{
+			$this->img = ' ';
+		}
+
 		// Make the alias URL safe.
 		$this->alias = JApplication::stringURLSafe($this->alias);