>Did the installer pick up the swap partition _as_ the root partition
>before you swapped them?

I don't think so. the console's msg error was:
mountfs (): error 22
fountfs failed
error 0
And the installer invite me to go back to the finder.

and when I type return to go back to the finder, 3/4 times, I had a
bomb error 0 (Bus error).

Disk Tools didn't found any damage on the Partition map, but only on
the driver or on the next partition's boot block. Yes, it's
really strange. I'll try disklabel and I will mail you back.
thanks for your care!

					Snoopy