Mine has developed the hair-line crack next to the latch and there is now a small amount of lateral movement.
I mentioned this at my last service (last week) and my dealer (Pidcocks) offered to replace it or wait on the supposed modified case/base plate that BMW are working on. I elected to keep mine for the mo. with the option to change it if it gets worse and ultimatley replace with the modified one when/if it ever materialises.
FWIW mine was the third complaint in so many weeks at Pidcocks but, prior to that, they said that none had been returned.
Andres