How to find changes between 1.2.x and Edge

Is there somewhere which summarises the important changes between Rails 1.2.x and Edge Rails?

It took me some digging around source code to discover that the URLs for REST custom controllers have changed, from     /foo/1;actionname to     /foo/1/actionname

If there's a summary of these sorts of changes, I'd very much like to have a read through it.

Thanks,

Brian.

The trac:

http://dev.rubyonrails.org/

And there’s a blog that tracks noticeable changes to Edge:

http://www.ryandaigle.com/

Otherwise, there’s always CHANGELOG in each repository to read through.

Jason