>I think that's the new feature that tell if a certain post is useful or not...
>Ex : You're the guy who ask a question and somebody gives a REALLY useful response... I think you can put stars beside them using a new option they add on April 12th...or so I heard.

We have to also keep in mind that not all messages are marked. Only a few of them are marked. It would be extraordinary good if everyone would take the time to mark but this is not the case. Some members are also busy and they may only mark certain messages a while later. So, there is no really specific guideline to mark. We suggest members to take the time to mark if some messages really help them.