Just finished installing snow leopard on my Mini10v and when I connected up my external monitor, I got the scrambled display that others have seen (and I saw on the Mini9)
anyway, unplugged external, fired up a terminal, typed in "mirroring off" and then replugged the display only to find that the command was not found.
Iwent back to the mini9 and Leopard and found it in /usr/bin/mirroring but it is not on the Snow Leopard disk. A copy of the command from Leopard to Snow did the trick, but wondered if Apple just didn.t include it or if they didn't install it? Anyway, for those of you upgrading and without access to another machine, copy it off somewhere and save it.