Infrequently Noted

I just spent 20 minutes in IRC with Wolfram staring down one of those situations where you keep swearing under your breath "println isn't broken....println isn't broken....println is NOT broken".

Catch this fun gem from FF3b2:

>>> typeof []
"object"
>>> var a = [];
>>> var b = new Array();
>>> a.constructor == b.constructor
false
>>> c = [];
[]
>>> c.constructor == a.constructor
true
>>> d = new Array();
[]
>>> b.constructor == d.constructor;
true
>>> b.constructor == a.constructor;
false

WTF?