TextField ValueChangeListener now fires on every keypress... :-(

Vaadin 6.8.2:

       this.queryField = new TextField();
        this.queryField.setImmediate(true);
        this.queryField.setWidth("100%");
        this.queryField.setInputPrompt("Type your search query here...");
        this.queryField.addListener(new Property.ValueChangeListener() {
            public void valueChange(ValueChangeEvent event) {
                System.err.println("Event: " + event.getProperty().toString());
            }
        });

valueChange() fires every time I type something new, not when I press ENTER key. This is different from http://demo.vaadin.com/sampler#TextFieldSingle
Is it new behavior? (and if yes, how to revert it back then?) or just a bug?

I tried your code with 6.8.2 version, but everything works fine (event is not fired when I type something new). Maybe something else is causing this behavior.