When performing an upgrade, one of the first things that I do is a perform a 'diff' on the web.config files to see what has changed from one release to the next. Even when there is documentation indicating what has changed, I find this to be very helpful.

I just did this on the 2.0.3 and 2.0.4 web.config files. Outside of the many formatting changes (i.e., one line broken into multiple lines), the only changes I noted were in the <microsoft.web.services2> section.

Does that sound correct?