Thank you for your reply... I suspected as much. It's such a pity that companies just "take" what the FOSS movement has to offer, then they happily ignore the ideas behind it -- they'd just support the Windows OS, even though there's probably no technical reason *not* to develop a (firmware update) protocol on top of a standard, leaving out the non-targetted 'consumer' platforms of *their* choice. It shouldn't be too hard to do: I understand other readers do it (for example, upgrading from a file in the SD card, etc.).