As you might recall, when Apple and AT&T first released the i4, one of the biggest customer gripes was the so-called "death grip:" holding the iPhone in such a way that your finger bridged the gap between any two of the three separate external antenna strips often (though not always) resulted in a precipitous drop of signal strength. Apple's initial response of "Well, don't do that, then!" was eventually modulated to "Okay, we'll give you a free bumper case so you CAN'T touch the damn antenna…"
The CDMA version of the i4 now sports four splits in the antenna bezel, one in each corner. According to a separate report in the New York Times, the new four-piece bezel was actually a design modification specifically for the CDMA circuitry. Unanswered at this time are (a) how/if the new antenna design will combat the "death grip" and (b) if it does, how soon does the Death Star's iPhones get the fix?