Strange one.
My Mini 9, BIOS A05, 2GB RAM has been running fine on 10.5 since the summer, but recently my RunCore died. I swapped the original 16GB STEC back in, which had OSX already installed, and RMA'd the RunCore. I have full Time Capsule backups, so I decided to do a fresh install with the latest bits into the replacement RunCore and then restore from Time Machine.
I built a USB installer from 10.5 Retail Media and the latest NetBootBootMaker using the Mini 9 as the host (stupidly, I did it over the top of the image I'd previously used successfully) and the installation proceeds smoothly. However, once I get the point where I'd like to install the 10.5.8 Combo, there are three problems:
1. The USB ports aren't visible: inserting a stick does nothing, and sudo dmesg reports nothing.
2. NetBookInstaller offers no choices for the filesystem to update, and all the options are greyed out
3. At boot time (thinking -x was worth trying) there is no progress bar showing the root device name: it goes straight to the apple logo with no chance to type boot options.
I've tried simply re-doing the installation, but the result is the same.
My next plan is to make the installation USB stick on my iMac, in case something odd happens using a Hackinstosh to make the installation kit (hard to think what, though). Then I have the older NetBookBootMaker binaries I used in August and October, so I can use those if necessary.
But I think this one might be worth tracking down.
ian