There seems to be a bug in WPF 4.0 DataGrids.

I'm implementing IDataErrorInfo on my objects, and I have an ObservableCollection that a datagrid binds to. I have ValidatesOnDataErrors=True set on the columns but nothing set on the rows. I have UpdateSourceTrigger="PropertyChanged"

The validation works perfectly on a cell by cell level. However, when you leave a cell invalid, go to any other cell and then return to the invalid cell and enter in valid data, the cell becomes valid but the row remains invalid when it should be valid.

wpf validation wpfdatagrid
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