Description:
------------
The SHM id returned by shm_attach will produce an error when used with shm_remove ("PHP Warning:  shm_remove(): The parameter is not a valid shm_identifier in /clustershare/cluster/shm.php on line 15
"). It CAN be used to detach, though.

Reproduce code:
---------------
// The key used was returned from a call to ftok(), but was placed here staticly for testing.

$id = shm_attach(1360651186, 20000);
shm_detach($id);
shm_remove($id);


Expected result:
----------------
No error message.

Actual result:
--------------
Produces only the specified error message.