1. Create a new project with RadGridView and bind it 2. Handle the UserAddedRow event 3. Run the project 4. Enter some text in a new row cell and click on the white space 5. You will see that the UserAddedRow event will not fire and the row will be added.
It appears that this is also the case if you tab through the row (when the add new row position is bottom) rather than hitting the Enter key. See http://www.telerik.com/community/forums/winforms/gridview/add-new-rowposition-bottom-causes-useraddedrow-event