Cheers for the tips Caf. Hmm...
My system had gone a bit odd (by way of concatenating my username with my full name on the login screen, for example), so I decided to download milestone 3 and have a go from there. Few more problems installing this time - had to manually install grub - but the thing is I still can't add users using YaST user and group management. It hangs on 'write passwords' forever.
Anyone else seeing this?
No more magically appearing tomboys, at least. Some progress.