Over at Samfirmware, new Omnia 7 firmware has been leaked - I8700XXKD1. Dated back to April this year, we're currently not aware of differences from the previous 18700XXKC1 and the update rolled out the past week. Flashing our device proves to be nothing better than a problem. According to comments over at MobileTechWorld, the binary is not signed for retail use and can only be used on OEM samples.

Source: Samfirmware, MobileTechWorld, thanks Philipp for the tip!