Can anybody explain why on some sites, if I go to edit (in SharePoint Designer) a page layout deployed via a feature, I get prompted with the "Saving your changes will customize a page from the site definition" message, but on other sites I don't? What is the deciding factor here?
The differences between the 2 particular sites in question are that one was deployed and instantiated from scratch with a custom site definition (plus activated features). It is that site where I get the message. The other site has been created via a content database restore originally from another farm. I have created new page layouts and deployed them in to the restored site and I still do not get prompted with this message if I edit the file in SPD. I want this message to be displayed to (1) deter users from updating the page layouts in SPD and (2) allow me to see which files have been edited so that I know that I need to bring the changes back in to my VS solution and then "Reset to Site Definition" in SPD, and then redeploy my solutions/features.
I hope this makes sense. I'm guessing that site collections created from a restored database cannot use uncustomised (ghosted) files but I'm hoping someone can dismiss this idea and provide a solution?
