Hello All, I just bought a used GA645 and I notice that the mode dial is acting a bit weird. As I flip through the apertures (in Av mode) I see that sometimes, not all the times, they pass by in the wrong order. Example: I can go from f/4, to f/5.6, to f/8, to f11 and then right to f/4.8, then f/16, f22, f5.6. It just seems weird that the apertures flip around like crazy. I cannot select them as I desire, except by just flipping and flipping until I hit the right one. I think the contact point on the dial might be dirty or something. Does Fujifilm still service this camera? I can go back to the seller and try to get them to repair it, but I'm in China and I have NO idea what their skills are. The camera is in fantastic shape and I'd rather Fujifilm fixed the camera if that is all it takes to get things right. Or, might this be some fatal flaw? Please let me know what you think!! Thanks!