FIX for WordPress Stats fatal error

I have other issues and needed to clean out (delete) admin; includes; and the public ‘files’ aside from config.
Most stuff went back in: I needed to put the two Sitemap xml files back in to ‘public’ to get Google XML Sitemap running again.
But with WordPress Stats I kept getting a fatal error pointing to wp-includes/class-IXR.php

I re-uploaded it via FTP and no change.
I saw that, in the wp-includes folder it was syntax: /class-ixr.php so I tried shifting the ixr to upper case. Could not do it in my FTP for some reason.
Went to my DirectAdmin and uploaded the wp 2.9.2 version of the file (with IXR in upper case) and WordPress Stats worked fine!
Went back to DirectAdmin, deleted the 2.9.2 version of class-IXR.php and uploaded the WP 3.0 version with correct uppercase syntax. It works!
So if anybody is experiencing this or a similar problem, be aware, some of the filenames, including wp-includes/class-IXR.php are CASE SENSITIVE !!
AND that your FTP may be changing the CASE on some critical files.

I am still trying to solve the fact my Auto-Upgrade does not work and I have completely replaced the entire WordPress aside from 4 files.
I can’t see why Config would affect “permissions to update plugins” which is still my problem.

BUT WordPress Stats fails if class-IXR.php is in all lower case.

Be warned. I bet someone will say here it shouldn’t do that – but it does.

Guran