We've been having problems using the Undo/Redo buttons while editing a campaign. On a number of occasions, clicking the "Undo" button has resulted in entire sections of the campaign disappearing entirely - like it's jumping back too far or something. Clicking "Redo" again does not fix it. All the work we've done appears to just be gone forever and we have to redesign the entire campaign. I've been avoiding using the "Undo/Redo" buttons as a result, but that adds time to the design process. Is there a better solution? We use Firefox to access Emma. Thank you.