Description of setAutoValidate() is that it validate on each key press but I see red mark only once user move out of the datefield cell... Is it a bug? or my assumption is wrong?

void com.sencha.gxt.widget.core.client.form.Field.setAutoValidate(boolean autoValidate)

Sets whether the value is validated on each key press (defaults to false).

OS - Windows XP
GXT - 3.0.1 free
Browser - IE/ Chrome / Firefox