This might seem like a newb question.. but since Master Pages have all those custom ASP.NET Server Control IDs which will give errors if they are not associated with the original master page. Can anyone give an educated answer on this?
I'm also asking because, I copied a master page and now every time I make changes to the master page. It completely breaks and looks as though all of the SharePoint Web Controls (Navigation etc) have broken away from the page. This happens even when I only put a single space and save the master page.
Can anyone help?