i don't remember having this with the update before 3.0, but anyway on 3.0 it has happened maybe 3 times since i updated, very few as you can see and the way to fix it is to let the screen go off and then hit the home key and swipe again( and it usually works then). I think it may be a lag, but not sure. anyone else have this.
btw i have restored as new iphone so its not that and it only happened after 3.0 it seems.
btw i have restored as new iphone so its not that and it only happened after 3.0 it seems.