A report from Macquarie Securities analyst David Gibson helped spur investor concern over Sony's next generation machine. "While the reason for [the PS3's technical difficulties] is unknown, we suspect it may be due to overheating as a result of enclosing the units and the high temperatures at the [TGS] venue," Gibson wrote in a report. "We are concerned that such a problem has occurred so close to full production and is clearly negative news for the company."