I'm currently using Drupal 7.24 and recently changed from CKeditor 3.x to CKEditor 4.2.2. I have ACF disabled.

If I use the embed media plugin that ships with CKEditor my video (using youtube's old embed) will save correctly and display correctly on the page. However, if I switch to source view, or edit after saving the object does not display. It exists in the source as a cke:object, but does not render in the editor so it just has a blank line where the video exists. It's not being stripped out at all, just not being represented. Previously it would convert this to a fake object image representation via the fakeobject plugin which also ships with CKEditor.

Has anyone else experienced this problem or know where the problem might lie? Any help would be appreciated.