I was trying to delete a master page in SharePoint designer, and I got the error “This item cannot be deleted because it is still referenced by other pages”. This was strange. I got a quick solution from microsoft http://support.microsoft.com/kb/926812….but it was not worth.
This is a know bug….Here is a quick solution…Just 3 steps
- Create a sub-folder in Master page gallery
- Move the master page into the sub-folder
- Delete the sub-folder