Removing internal references to the EXT constant.  Additionally, marked the constant as deprecated.  Use ".php" instead. Also adding upgrade notes from 2.0.2 to 2.0.3.
diff --git a/system/helpers/smiley_helper.php b/system/helpers/smiley_helper.php
index a2d1031..6d88893 100644
--- a/system/helpers/smiley_helper.php
+++ b/system/helpers/smiley_helper.php
@@ -229,13 +229,13 @@
 {
 	function _get_smiley_array()
 	{
-		if (defined('ENVIRONMENT') AND file_exists(APPPATH.'config/'.ENVIRONMENT.'/smileys'.EXT))
+		if (defined('ENVIRONMENT') AND file_exists(APPPATH.'config/'.ENVIRONMENT.'/smileys.php'))
 		{
-		    include(APPPATH.'config/'.ENVIRONMENT.'/smileys'.EXT);
+		    include(APPPATH.'config/'.ENVIRONMENT.'/smileys.php');
 		}
-		elseif (file_exists(APPPATH.'config/smileys'.EXT))
+		elseif (file_exists(APPPATH.'config/smileys.php'))
 		{
-			include(APPPATH.'config/smileys'.EXT);
+			include(APPPATH.'config/smileys.php');
 		}
 		
 		if (isset($smileys) AND is_array($smileys))