I just got my X100 back from Fuji UK. It took exactly one week from when I emailed them about the problem to the camera being returned to me all fixed and like brand new again. Fuji kept me informed by email at regular intervals and I'm very impressed with their efficiency at dealing with the SAB issue. Also included was a signed and dated certificate listing 23 parameters that Fuji checked on the camera. The new lens assembly is quieter than the previous one but focus speed is unaltered. However, it is sharper than the previous unit so I'm thrilled to bits ! It's good to be able to use the camera at apertures other than f2.0 again !