They don't materially change the content of the bill. Of course, if the bill doesn't fit for you, if the FIE and NRT provisions don't apply, say, for 2004 and you want them to apply for 2004, well, then it's material to you. But in terms of what this bill does and how it works, no, there are no material changes.
On June 7th, 2007. See this statement in context.