diff --git a/system/codeigniter/Common.php b/system/codeigniter/Common.php
index 124ad9a..d2342de 100644
--- a/system/codeigniter/Common.php
+++ b/system/codeigniter/Common.php
@@ -72,7 +72,7 @@
// identically named file in the application/libraries folder.
// We need to determine, however, if the class being requested is
// a sub-class of an existing library or an independent instance
- // since each needs to be handled slightly differently.
+ // since each needs to be handled slightly different.
// To do this we'll open the requested class and read the top portion
// of it. If the class extends a base class we will load the base first.
// If it doesn't extend the base we'll only load the requested class.
@@ -84,12 +84,12 @@
// replaced on-the-fly with nothing required for the user to do
// except write the declaration. Fortunately PHP is ridiculously fast
// at file reading operations so I'm not able to discern a performance
- // hit based on my benchmarks, assuming a reasonable number of core
+ // hit based on my benchmarks, assuming only a small number of core
// files are being extended, which will usually be the case.
$fp = fopen(APPPATH.'libraries/'.$class.EXT, "rb");
- if (preg_match("/MY_".$class."\s+extends\s+CI_".$class."/", fread($fp, '6000')))
+ if (preg_match("/MY_".$class."\s+extends\s+CI_".$class."/i", fread($fp, '6000')))
{
require(BASEPATH.'libraries/'.$class.EXT);
require(APPPATH.'libraries/'.$class.EXT);