Forgot to post this one. Out of the box, my Karma came with RMM 2.20 build 10 on the CD. When I launched it, no updates were found, and when the update program was manually run, it still didn't pick up anything. I then docked the Karma, and ran the update program. It saw the 1.41 firmware update and downloaded it, proving the internet link was working fine for RMM.
In the end I manually downloaded 2.40 build 9 from the support web site.