I’m having the exact same issue. I can create of jobs but I cannot save any changes. I can’t even rename the jobs, the settings are simply never saved and there is no warning or error message.
This is only happening since the most recent update a few days ago. Prior to that it was working fine (for the last year or more).
I am using the latest versions of WordPress and BackWPup.
WordPress Version 3.4.1
BackWPup Version 2.1.15
I’m guessing this must be a bug?
EDIT: I just tested and I am able to make a copy of an existing job, although I cannot make any changes to it. But I am not able to create a new job from scratch. As soon as I hit save it just displays the settings from the existing job and anything I entered is immediately lost. There is no error or warning. Very strange.