When adding a bound bean property (ALT+ENTER -> Add Property), the code generated for the set<Property> is wrong.
Exemple of code generated:

    public void setString(String string) {
        String oldString = string;
        this.string = string;
        propertyChangeSupport.firePropertyChange(PROP_STRING, oldString, string);
    }

The first line of method should be:

    String oldString = this.string;

(Netbeans 6.1 200804060002)