Description:
------------
Using php 5.3.3-1 array_map needs to have the namespace included in the callback despite being called from within the same namespace.

This came up with OAuth.php. Example:

Test script:
---------------
namespace mynamespace;

class OAuthUtil {/*{{{*/
  public static function urlencode_rfc3986($input) {/*{{{*/
	if (is_array($input)) {
		return array_map(array('OAuthUtil','urlencode_rfc3986'), $input);
	} else if (is_scalar($input)) {
		return str_replace('+', ' ',
	                       str_replace('%7E', '~', rawurlencode($input)));
	} else {
		return '';
	}
  }/*}}}*/
}

Expected result:
----------------
It should work the same as if the namespace were specified in the callback, but it doesn't:

namespace mynamespace;

class OAuthUtil {/*{{{*/
  public static function urlencode_rfc3986($input) {/*{{{*/
	if (is_array($input)) {
		return array_map(array('\mynamespace\OAuthUtil','urlencode_rfc3986'), $input);
	} else if (is_scalar($input)) {
		return str_replace('+', ' ',
	                       str_replace('%7E', '~', rawurlencode($input)));
	} else {
		return '';
	}
  }/*}}}*/
}

Actual result:
--------------
It does not find the function that it should.