I believe they have the discs that came with the Mac Mini in 2005. I think they are trying to upgrade via downloads. I do not know if they have the disks for 10.4. They said they were able to get to 10.3.9 by two downloads, so I am assuming that is how they are trying to get to 10.4
Safari is the only thing they have told me causes the crash. I think they got enough information from the various places I pointed them to that they have been trying to upgrade the operating system as the older version of safari appears to not be robust enough to handle current websites.
I do NOT know if they tried reloading safari... it should have already been installed.
Thank you for your step by step instructions. I have passed this information along. I just feel bad they can't get the machine to work... I have had no problem from the other one that I also sold. I have a feeling from the way they have communicated that they are not that familiar with MacMini or working with older systems in general. Appreciate the real-time help!