In the release notes that I have for firmware 1.10, dated 1/5/12 9:00 AM, I see nothing about the release being dedicated to Rev. C1 hardware. I have had the 1.10b7 release installed on three B1 units to format the disks. After formatting I reinstalled 1.09 because 1.10 was still a beta release. Others have pointed out that the official 1.10 version is identical to 1.10b7.