As far as I know codepages is all about the browser (usually handles this well) and server-side solution (your milage may vary). When it comes to problems with (F)CKEditor, my problem in this particular case is usually the markup.
The markup from Word may be "slightly" mangled and all, but you need massive amounts of server-side code to clean it up and it just feels so unnecessary when it actually renders fine in the editor client-side.
Small but very annoying bug. In the end I switched to the YUI rich-text editor and it seems to be working better.