Was wondering if upgrading Olympus E-PL5 gray market camera would be a problem. My other Pen cameras you download software to your computer and run it and hook up a USB cable to do the upgrade. Was wondering if I download the Olympus software from the American website will it upgrade the firmware from a Olympus camera from Japan? Found this on Nikon's page. http://nikonasia-en.custhelp.com/app/answers/detail/a_id/4733/~/nikon-vs-grey-market Users are able to register their product online to download software and firmware upgrades. Owners of grey items may not be able to download online software and firmware upgrades available from the Nikon site, due to incompatible serial numbers.