I am a novice so excuse me if I ask a silly question.

I tried to improve our web site at www.prnaa.com by attempting to keep the names of the html page files in lower case. I amended the feed.xml file to reflect the new names and everything looked fine on my test server. However, when I uploaded the site contents, my navigation bar appears to be still seeking the pages by their old names. (For example, instead of directing to "about-prnaa.html", it tries to navigate to the old name, "About_The_PRNAA". I can manually enter the new name (http://www.prnaa.com/PRNAA/about-prnaa.com) and I will be directed to my page by getting there via the navigation page isn't working.

Is there someplace other than the feed.xml file that defines the relationship between the GUID and the associated html file?