=== on objects fails with recursion! WTH?

if ($object1===$object2) does a recursive check! "Fatal error: Nesting level too deep - recursive dependency?" Whats going on? I've go lots of object references all highly recursive and I just sometimes need to check if two objects are the same object i.e. they have the same storage address; I don't need to (and can't afford the time) to recursively check every field. Is there a ==== instead that REALLY does what it seems === is trying to fake, presumably to cover up all the object copying that is normally going on but that I've managed to avoid? Sam