Description:
------------
When I have a large collection of objects stored in a SplObjectStorage it starts 
to behave strange. It says that an object already exists in the storage and 
returns the stored data for another object. 

Test script:
---------------
$limit = 1000;
$objects = new SplObjectStorage;
for($i = 0; $i < $limit; $i++){
	$object = new StdClass;

	if(isset($objects[$object])){
		die("this should never happen, but did after $i iteration");
	}

	$objects[$object] = 1;
}

echo "\nfinished\n";

Expected result:
----------------
The script should never enter the if condition and die, because the object has 
not been added to the object storage yet

Actual result:
--------------
The scripts dies because of it finding an object in the storage that should not 
have been there. This happens at random iteration, i'm guessing based on memory 
usage or something.