Recently went to fire up my S3 at work only to discover the battery was dead--despite having disconnected it from an overnight charge (on the official charging unit) that morning. Went home and discovered that, even though the charging cord light was on (which I assumed meant 'charging'), it wasn't charging the battery. Had to wiggle the cord a bit before the charging actually began. Today, plugged it in--no problem. My brother (who works for Microsoft) thinks he's seen reports of this and it might be firmware related. Thoughts?