Any design change (especially if it occurs on the white Iphone 4) will be taken as admission of a defect - and the lawsuits will be launched.
If there is "no problem", then why does it need a redesign?
Lawsuits??? For what?????
It's obvious that someday there will be an iPhone 5... probably at least a year off given that's Apple's development schedule on the iPhone.
People... I agree 1000% with one of the other posters... can we get over the antenna issue? You can't sue over it, Apple is not trying to screw you and there is no huge Steve Jobs anti customer conspiracy going on.
If you actually owned an iPhone4, you'd know the Proximity Sensor is the biggest issue on the phone and they're going to fix it.