You can check the latest Release Notes here.
- DataFormValidationSummary Errors and HasErrors properties are now read-only. Errors still support modifications of its items (add/remove), but it no longer has a public setter.
Removed the IsRequired property of DataFormDataField. It was marked as obsolete with Q3 2012
Removed the Telerik.Windows.Controls.Data.DataForm.ErrorInfo type. It was marked as obsolete with Q3 2012. Telerik.Windows.Controls.Data.ErrorInfo should be used instead
Removed a unneeded item-validation check on cancel.
Setting the access modifier of DataFormDataField.GetControlBindingProperty() to protected internal.
Telerik.Windows.Controls.Data.DataForm.ErrorInfo is now obsoleted. Use Telerik.Windows.Controls.Data.ErrorInfo instead.
The label element (“PART_Label”) of DataFormDataField is now ContentControl (TextBlock previously). Old custom themes should not be affected.
The default value of the AutoCommit property is now true. Previous default behavior of RadDataForm is the same.