diff --git a/ChangeLog b/ChangeLog
index d9b9dc6345..0cea8fa02e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -45,6 +45,7 @@ phpMyAdmin - ChangeLog
 - bug #4334 Add event : datepicker won't open
 - bug #4338 Fix missing value error while executing SQL query
 - TCPDF library is now optional dependency
+- bug #4326 Cannot find the import plugins which start with uppercase 'I'
 
 4.1.11.0 (2014-03-23)
 - bug #4335 reCaptcha problem (4.1.10 regression) 
diff --git a/libraries/plugin_interface.lib.php b/libraries/plugin_interface.lib.php
index 8d4736aeca..925a890db6 100644
--- a/libraries/plugin_interface.lib.php
+++ b/libraries/plugin_interface.lib.php
@@ -62,8 +62,8 @@ function PMA_getPlugins($plugin_type, $plugins_dir, $plugin_param)
         // (for example ._csv.php) so the following regexp
         // matches a file which does not start with a dot but ends
         // with ".php"
-        $class_type = strtoupper($plugin_type[0])
-            . strtolower(substr($plugin_type, 1));
+        $class_type = mb_strtoupper($plugin_type[0], 'UTF-8')
+            . mb_strtolower(substr($plugin_type, 1), 'UTF-8');
         if (is_file($plugins_dir . $file)
             && preg_match(
                 '@^' . $class_type . '(.+)\.class\.php$@i',