I just noticed that using the throttle extender causes Knockout Validation to stop working. Is there a way around this problem?
var viewModel = {
label1: ko.observable('label1').extend({required: true}),
label2: ko.observable('label2').extend({required: true, throttle: 1}),
};
ko.applyBindings(viewModel);
jsFiddle: http://jsfiddle.net/rWqkC/