After upgrading CKEditor 7.x-1.9 to 7.x-1.12 (using ckeditor_4.0.1_standard) on various sites hosted on different servers the result invariably is a blank text area only when i want to edit a page, article etc that was created with CKEditor 7.x-1.9.
If I press save, all previously saved info is overwritten and lost.
It is however no problem to create new pages with CKEditor 7.x-1.12, all works fine.
Any clues or solutions? (apart of downgrading all sites to 7.x-1.9 again, that's not an option!)
Problem occurs on D7.17, D7.18, IExplorer, Firefox and Chrome alike.
Really hope someone can help, cause on a couple of sites in question there's a lot of activity.