Problem updating global footer
Hi!
I'm trying to update the copyright in a global footer template. I open the template, make the changes,try to save, get this screen, and click "Update":

And then I get this screen which I find completely confusing.

I have no idea what this means or what to do about it and I'm afraid I'll mess up the whole site if I make an error. Can anybody help me understand this and how to update the site without making a problem?
Thanks!! (I'm on Windows 7 and DW CS6.)
