I wish to do a fresh install of Leopard on my Powermac having already gone through the process on my Powerbook. Am I able to reinstall Leopard with the Leopard upgrade DVD (original disc) if my Mac is already running Leopard (10.5.6)? The guy at Apple Australia technical support says there should be no reason why not, yet when I put the disc in my Powerbook and restarted while holding down the 'C' key nothing ever progressed beyond the light grey screen with the dark grey Apple logo no matter how long I held down the key.
In the end I had to resort to installing Tiger (for which I do have the original install DVD). Once Tiger was installed I then put the Leopard upgrade DVD in and restarted while holding down the 'C' key and the Leopard installer appeared after a short time (as it should). I could then upgrade (back) to Leopard. Then it was simply a matter of downloading and running the 10.5.6 combo update. Now my question is did Apple deliberately engineer the Leopard upgrade DVDs so they won't work if you're already running Leopard? I don't see why I should have to go back to Tiger first.