A defect has presented in some iPhone 5 touch panels produced by Wintek which may affect the ability to meet initial shipment targets for the launch which is expected in October, according to iPhone supply chain makers. In response, Wintek simply indicated that all of its products are being delivered on schedule.
http://9to5mac.com/2011/09/23/delay...nels-could-affect-initial-iphone-5-shipments/
I know this doesn't confirm anything about the iPhone 5 and if it's gonna be announced on the 4th but one can hope.