I just tried using snapshot to move from a subsite to a new single install site and ran into some issues using snapshot 188.8.131.52
Any users with superadmin credentials user did not transfer. I verified that the main (ID1) user on the subsite and new site had same ID, password, username, email address, and even nicename. After restoring the subsite to the new install, the admin user was lost and I was essentially locked out of the new site. I also noticed that another user (who was also a superadmin) did not transfer.
Also, although I selected "all files" in the original snapshot, none of the plugins transferred to new site either. Also, the current theme was not a selectable object when making the original snapshot to transfer (on subsite) just twentyten and twentyeleven.
This issue has managed to orphan many BBPress posts which you can imagine is quite a problem. The posts now appear to be from "anonymous" as opposed to the actual user.
Any idea/tactics as to how I can remedy this situation? Was I missing something in the transfer?