"ObservableValidator" and exceptions?

[plettb]

My situation is that I have a TextBox bound to an integer.

It would appear that exceptions (e.g. the conversion exception that happens when a user enters text into a TextBox that is bound to an integer) raise the appropriate error notification events, but do not get added to the ObservableValidator's validation errors. Even though I have "ValidatesOnExceptions=True" in my binding, and the error shows up fine in my error display (e.g. a TextBlock with Text="{Binding (Validation.Errors)[0].ErrorContent, ElementName=NameTextBox}"), the ObservableValidator's "HasErrors" is still false.

Is this behavior I can change, or is it a bug?