Thanks Matt, I think I understand your suggestion now. I really do need to apologize for not grasping what you/Barb/Winfried were suggesting. I'm not a very experienced user and new to the updated version; I'm still figuring out a few things. I apologize if I'm missing something obvious, but I still don't understand how I can open a file in FM v12 and the headers are correct. When I open the same file in FM v17 I get this misalignment. I can only guess something happens when the file is updated/converted for FM v17?
I really do appreciate all the help.
Bill
No worries, sometimes strange things happen! Perhaps the default width of the master page headers is different in the two versions.
I've even seen places where FrameMaker is "forgiving" of improper syntax in an early version, and then not-so-forgiving of an error in later versions. The good news is that you're moving away from a very old version of the product into something that should work much better (and faster!) for you with the current release.
Once you have your master pages working, if you don't have master page overrides on your body pages (you probably don't...) then you can import Page Layouts from the updated file into the other files in your project, using the File > Import > Formats command.