First thing after installing 6.7.1 to HD on an Advent QC430 laptop (apart from editing the boot string to UK language and timezone and enabling WiFi) is to run Synaptic to upgrade the default install, before adding/configuring anything else. This is failing when trying something with 'perl': E: Could not perform immediate configuration on 'perl'. Please see man 5 apt.conf under APT::Immediate-Configure for details. (2) Any ideas as to why? BTW, the upgrade list presents the 'knoppix-firewall' package as 'Not Authenticated' ... is there a query with this?