Removing old Facebook Javascript library and use the new one will cause some code to break, and how to use old and new API at the same time?

Question

To use both the Facebook REST API and Graph API, somebody recommended not using

http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php

but use the new code only, which uses

connect.facebook.net/en_US/all.js

But then the old code which calls

FB.XFBML.Host.addElement

will stop working. Any idea?

related to question http://stackoverflow.com/questions/3929687/what-is-the-best-way-to-use-old-facebook-rest-api-and-new-facebook-graph-api-on-t