diff --git a/system/helpers/download_helper.php b/system/helpers/download_helper.php
index 56e4c2a..e537cde 100644
--- a/system/helpers/download_helper.php
+++ b/system/helpers/download_helper.php
@@ -58,13 +58,13 @@
 		$extension = end($x);
 
 		// Load the mime types
-		if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT))
+		if (is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT))
 		{
 			include(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT);
 		}
-		else
+		elseif (is_file(APPPATH.'config/mimes'.EXT))
 		{
-			@include(APPPATH.'config/mimes'.EXT);
+			include(APPPATH.'config/mimes'.EXT);
 		}
 
 		// Set a default mime if we can't find it
diff --git a/system/helpers/file_helper.php b/system/helpers/file_helper.php
index f4b48b4..7a35c3f 100644
--- a/system/helpers/file_helper.php
+++ b/system/helpers/file_helper.php
@@ -352,13 +352,13 @@
 
 		if ( ! is_array($mimes))
 		{
-			if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT))
+			if (is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT))
 			{
 				include(APPPATH.'config/'.ENVIRONMENT.'/mimes'.EXT);
 			}
-			else
+			elseif (is_file(APPPATH.'config/mimes'.EXT))
 			{
-				@include(APPPATH.'config/mimes'.EXT);
+				include(APPPATH.'config/mimes'.EXT);
 			}
 
 			if ( ! is_array($mimes))
diff --git a/system/helpers/html_helper.php b/system/helpers/html_helper.php
index 15c15a9..53fc899 100644
--- a/system/helpers/html_helper.php
+++ b/system/helpers/html_helper.php
@@ -258,13 +258,13 @@
 
 		if ( ! is_array($_doctypes))
 		{
-			if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/doctypes'.EXT))
+			if (is_file(APPPATH.'config/'.ENVIRONMENT.'/doctypes'.EXT))
 			{
 				include(APPPATH.'config/'.ENVIRONMENT.'/doctypes'.EXT);
 			}
-			else
+			elseif (is_file(APPPATH.'config/doctypes'.EXT))
 			{
-				@include(APPPATH.'config/doctypes'.EXT);
+				include(APPPATH.'config/doctypes'.EXT);
 			}
 
 			if ( ! is_array($_doctypes))
diff --git a/system/helpers/text_helper.php b/system/helpers/text_helper.php
index 99f521f..6644089 100644
--- a/system/helpers/text_helper.php
+++ b/system/helpers/text_helper.php
@@ -366,18 +366,13 @@
 {
 	function convert_accented_characters($str)
 	{
-		if ( ! file_exists(APPPATH.'config/foreign_chars'.EXT) AND ! file_exists(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars'.EXT))
+		if (is_file(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars'.EXT))
 		{
-			return $str;
+			include(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars'.EXT);
 		}
-
-		if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/foreign_chars'.EXT))
+		elseif (is_file(APPPATH.'config/foreign_chars'.EXT))
 		{
-			include APPPATH.'config/'.ENVIRONMENT.'/foreign_chars'.EXT;
-		}
-		else
-		{
-			include APPPATH.'config/foreign_chars'.EXT;
+			include(APPPATH.'config/foreign_chars'.EXT);
 		}
 
 		if ( ! isset($foreign_characters))