Sorry, i can't edit top post which submitted by accident.
When the user types an invalid value in the combo box field that does not match any of the items, and submits the form, the correct modelstate is generated saying the value is invalid. The user is then directed back to the View:
But no matter what the User does the ModelState will always be invalid for that combo box field. Is this a bug since I thought changing the value again should clear the ModelState for that property?