I bought a refurbished OM-D M5 in November. I discovered in April that the camera suffers from a shutter problem at higher shutter speeds. Some frames are completly black. Others are just rak. I bought the camera i US. I fear that the repair here in Sweden will be very expensive. Olympus do not want to answer the question! It might be cheaper buying a used one. But how common is the problem? Do not want to have another one with the same problem. What is the repair cost in the US?