Using S mode at 100 ISO . . when dialing shutter speed down . . the coresponding aperature continues to move as high as f9 but won't go any higher and turns red at that point . . and images taken at shutter speeds lower than that are of course overexposed due to an aperature that has remained at f9 which is too open when combined with the slower shutter speed. Question: are there any other X30 users experiencing this same thing? Can someone explain if this is a 1) limitation of the camera, 2) a setting that can be changed, 3) a malfunction of some kind, 4) something else?