Index: branches/RC/core/kernel/processors/main_processor.php
===================================================================
diff -u -N -r10031 -r10098
--- branches/RC/core/kernel/processors/main_processor.php	(.../main_processor.php)	(revision 10031)
+++ branches/RC/core/kernel/processors/main_processor.php	(.../main_processor.php)	(revision 10098)
@@ -41,10 +41,10 @@
 			$path = preg_replace('/\/(.*?)\/(.*)/', $module.'/\\2', THEMES_PATH); // remove leading slash + substitute module
 		}
 		else {
-			$path = substr(THEMES_PATH, 1);
+			$path = mb_substr(THEMES_PATH, 1);
 			$module = isset($params['module']) ? $params['module'] : 'core';
 
-			if (strtolower($module) == 'in-portal') {
+			if (mb_strtolower($module) == 'in-portal') {
 				$module_folder = 'platform';
 			}
 			else {
@@ -648,7 +648,7 @@
 		$current_template = $this->Application->GetVar('t');
 		$skip_prefixes = isset($params['skip_prefixes']) ? explode(',', $params['skip_prefixes']) : Array();
 		foreach ($this->Application->ModuleInfo as $module_name => $module_data) {
-			$module_key = strtolower($module_name);
+			$module_key = mb_strtolower($module_name);
 
 			if ($module_name == 'In-Portal') {
 				$module_prefix = $this->Application->IsAdmin() ? 'in-portal/' : $module_data['TemplatePath'];