diff --git a/system/core/Config.php b/system/core/Config.php
index 6841743..5424e5e 100755
--- a/system/core/Config.php
+++ b/system/core/Config.php
@@ -76,7 +76,7 @@
 		log_message('debug', 'Config Class Initialized');
 
 		// Set the base_url automatically if none was provided
-		if ($this->config['base_url'] == '')
+		if (empty($this->config['base_url']))
 		{
 			if (isset($_SERVER['HTTP_HOST']))
 			{
diff --git a/system/libraries/Table.php b/system/libraries/Table.php
index fb154e5..8f6ac8d 100644
--- a/system/libraries/Table.php
+++ b/system/libraries/Table.php
@@ -102,7 +102,7 @@
 	 */
 	public function make_columns($array = array(), $col_limit = 0)
 	{
-		if ( ! is_array($array) OR count($array) === 0)
+		if ( ! is_array($array) OR count($array) === 0 OR ! is_int($col_limit))
 		{
 			return FALSE;
 		}
@@ -395,7 +395,7 @@
 		// First generate the headings from the table column names
 		if (count($this->heading) === 0)
 		{
-			if ( ! method_exists($query, 'list_fields'))
+			if ( ! is_callable(array($query, 'list_fields')))
 			{
 				return FALSE;
 			}