Hello everyone. Ive own my 13" macbook pro for 2 years and no issue until i noticed a little issue recently. Ive upgraded to lion since the release date. The issue im having right now is the sound. Sometimes after a couple of days without rebooting the mbp, the sound would just stop working. The only way to get it back working again is by rebooting it. Anybody is having this issue? My mbp is out of warranty by the way.