thanks for the information and the attached sample.
I simply would say this line of code
|this.RadGridView1.ValidationMode = ValidationMode.Row;//This is important! Without this OnRowEditEnded will not fire.
does the trick.
So it's not a bug - it's just a behavior that changed with the new version
and the thing is missing in documentation.
I guess this should be "extra highlighted" and reference.
What I mean is - if I look at the RowEditEnded event there should be a note "CAUTION: event fires only when..."