I am not able to generate a valid sitemap.  It runs just fine, and generates the urls accordingly.  When it is finished, I can see the sitemap preview from the "view sitemap" tab.  But when I download the file and view it (or if I validate it,) it is a garbled mess and will not validate.

I have tried using utf-8 settings both on and off, and I get the same results.

What could the problem be?
Thank you.  I sent a private message.  Please let me know what you find.