There is this small but noticable clicking sound coming from the left side of the notebook. It usually happens every 10 seconds or so but sometimes I won't hear it for a while too. Sometimes there will be just one click and then sometimes one click will be followed by another. It definitely is either the HD or the upper left fan but I really can't tell. It does sound similar to a clicking sound that my video iPod makes from time to time which is what makes me think it is my HD. I am not necessarily thinking that this is a problem but I just wanted to see if everyone else has noticed this on thier notebook.