From the content root,
I create a new Place object.
Add only Title and Image and try to publish.
I have an error.
Try to discard, can't as I then have the wheel of death...
note: I tried editing different fields, sometime I had the same error, sometime I had different errors, where I would have an error but the wheel would stop and I could discard, and I would notice that the object would still be created (eg here: http://roland3.ezstudiodemo.com/Tigne)