I was going around in circles, failing to add my own SUSE DVD as an installation source (and never did discover why DVD ever _stopped_ being an Installation Source). Yesterday, I stumbled on an old post in another forum, in which somebody with a similar problem (on an earlier SuSE version) got some relief by - Booting from DVD - selecting Installation - proceeding through the initial Installation process until - when presented with option to "Repair" existing system... took it. I did get BOOT LOADER ERROR DETECTED, though not any other errors (such as might lead one to suspect a problem with DVD or fstab, etc.), and told it to rebuild. After that, the check again reported BOOT LOADER ERROR DETECTED. I don't know why that would be, since I have always been able to boot just fine, and I don't see any ominous messages in the logs. Nevertheless, when I rebooted into SUSE 10.0, I tried a Packman update which also wanted something from DVD 1, and this time there was no complaint. So something worked. For now, at least, the problem appears to have fixed itself. Kevin