you're not the only one anymore, got the puegot/citroen stubby this afternoon, mine snapped also, it was solid as a rock, i just got the antenna deck lose, so tomorow i'm off to the dealer.
I just removed the stubby that was fitted to the M3 when I bought it. Compared to the Z with its 'whippy spec' job, the reception was poo poo. Just fitted an OEM whippy to the M3 now its better than the Z 8) The M3 works similar to the 5 series in that the display shows all the available stations, it now covers two pages at home