problem with System.php under Zend 2

System.php has a method named mkDir that makes calls to mkdir() - those are supposed to call the built-in PHP mkdir() function, but the ZE2 changes are causing it to call itself instead, unti it falls over. In ZE2 you can fix that with just main::mkdir(), but then that doesn't work with the current version. Only thing I could think of that worked in both was call_user_func('mkdir',$dirname,$umask), which seems kind of ewww. Anyways, that diff is attached if it's of use - just wanted to mention the problem.