MDL-10221 Ajax problems have returned in 1.9.9

"Having problems deleting course items with Ajax enabled.
When I delete any item (resource or activity) with Ajax enabled the item disappears after the confirmation box. When the course page is reloaded the deleted item reappears.

Disabling Ajax allows items to be deleted successfully."

Also "when I try to drag blocks and drop them to a new location, they move, but when you turn editing off they move back to their original positions."