Designer.xml Fatal Parsing Error

I ran into a little snag working with a new web page. When I fired up
DreamWeaver CS4 it gave a fatal parsing error associated with the designer.xml
file. DreamWeaver would sit and spin its wheels and would not load. After
trying several things to fix it, and with an extreme desire to not go through a
complete reinstall, I decided to rename the designer.xml file and restart
DreamWeaver. Cool part is it worked. DreamWeaver created a new designer.xml
file and all seems to be functioning properly.