Creating a diff out of trac

Greets:

OK, I'm drawing a blank.

How do I create a diff between two different versions?

http://core.trac.wordpress.org/browser/tags/3.0.3

http://core.trac.wordpress.org/browser/tags/3.0.4

This is what I get.

http://core.trac.wordpress.org/changeset?old_path=%2Ftags%2F3.0.3&old=16807&new_path=%2Ftags%2F3.0.4&new=17243

There had to be more than that.

thanks,
-drmike