My iphone 4 does this, my 3GS did and my colleagues 3G too. If you leave it 30 seconds or so after it has 'frozen' (even though the icons continue to wiggle) it reboots itselfIm getting an annoying problem with mine.
When I have like 4 lines of apps open in the multi tasking dock and i just carry on pressing the kill icon my whole iPhone freezes and I have to do a hard reset, and this is on an iPhone 4!![]()
