I have gotten time machine working wirelessly on my mpb, but when i try it on my mb, it doesn't work. if i select none from backup drives, i can choose to browse other time machine and it works fine, just when i choose for that same drive to be a backup, it doesn't want to work. i have tried to both the initial backup plugged in and wirelessly. it seems that over airport, it mounts another disk image, while a regular backup is saved directly to the drive. does anyone have any ideas?