I have the same issue, random requests asking me if I want to switch to Tablet mode. Although, I have been in and out of the check for update window setting this computer up. I just bought the surfacebook and all the updates installed. I haven't even tried to detach the screen yet and the surfacebook has been sitting on my office desk so no movement.
I have other issues related to USB/Device cutting in and out, but I'll post that on another thread :)