Is it right？

[windwhinny]

var newFn = function() {
    // this is pretty ugly, but we need to run the code below before the callback
    process.nextTick(function() {
        fn.apply(this, arguments);
     });
}
...
...
var obj = oldInit.call(this, doc, query, newFn);

I notice that at line 66 of index.js, the arguments is the arguments for the anonymous function in nextTick, not for the newFn.
Is it right?

I think this is better.

var newFn = function() {
    // this is pretty ugly, but we need to run the code below before the callback
    var args=arguments
    process.nextTick(function() {
        fn.apply(this, args);
     });
}

[sieira]

Will check it