There is a catch though if you render elements from different libraries, the options are completely overwritten

This example used to work. The `sidebar` belongs to library B, pager to the library A

```php
<?php echo $this->_render('element', 'pager', array(), array('library' => 'A')); ?>
<?php echo $this->_render('element', 'sidebar'); ?>
```

If you reverse the order it still works, but in cases where you render multiple elements from multiple libraries you can't simply depend on the order they are called. You have to define the library for all the elements to be safe. I don't know if this is a bug or simply a BC break but i think the original library option should be preserved.