All, Apologies for the bandwidth used. I had the entry for security.debian.org stable updates in my /etc/apt/sources.list.
Upgrade-system saw that and attempted to downgrade my entire system such that it complied with the latest security updates for stable or some such - resulting in the perverse output. Commenting out the offending line and rerunning the command sorted it out. Not immediately obvious - cross posted to -devel (since I started the thread in error here when I couldn't remember where I'd seen it before) and to -user in the hope that it helps the other gentleman who is experiencing problems. HTH someone, Andy -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]