I've recently tried to upgrade firmware for my TV- I have the last version of the 0.75.* branch. I downloaded correct zip unpacked and copied it to pendrive (fat32 formatted, 4gb) then I plugged it in. TV started installation, but after running, during the validation phase, it showed window with info that upgrade is impossible. Then I removed USB stick, restarted TV with remote (strange thing, it turned on again itself and then asked about upgrade again and I had to turn it off using big switch on the bottom...). It still works on the old software and I can't install new one... Any ideas?