node-detach.js

// Works. Logs 'click'.
YUI().use("event", "node", "node-event-simulate", function(Y){
    var node = Y.one(".item");
    node.on("foo|click", function() {
        console.log("clicked");
    });
    node.simulate("click");
    node.detach("foo|click");
    node.simulate("click");
});

nodelist-detach.js

// Does not work. Logs 'click' x2. If called again, x4 and so on.
YUI().use("event", "node", "node-event-simulate", function(Y){
    var nodes = Y.all(".item");
    var node = Y.one(".item");
    nodes.on("foo|click", function() {
        console.log("clicked");
    });
    node.simulate("click");
    nodes.detach("foo|click");
    node.simulate("click");
});

nodelist-each-detach.js

// Works. Logs 'click' once.
YUI().use("event", "node", "node-event-simulate", function(Y){
    var nodes = Y.all(".item");
    var node = Y.one(".item");
    nodes.each(function(n) {
        n.on("foo|click", function() {
            console.log("clicked");
        });
    });
    node.simulate("click");
    nodes.each(function(n) {
        n.detach("foo|click");
    });
    node.simulate("click");
});