Array.pushUnique() does not handle arrays containing objects

[PhilHawksworth]

If I push an object into an array which already contains an identical object, pushUnique should prevent duplicates being added to the array.

For example

var test_obj_arr = [{id:1}, {id:2}];
test_obj_arr.pushUnique({id:2});

should not alter the array.

[MartinBudden]

Milestone 2.6.2 deleted

[MartinBudden]

Although the current behaviour is technically wrong, it is known and can be worked around. pushUnique was written as a convenience function for basic types.