Hi, with reference to live net-installer arch=x86_64/i386 d/l 16 Aug from: http://cdimage.debian.org/cdimage/weekly-builds/multi-arch/iso-cd/ Library liblzo2.so.2 missing or not installed when attempting 64bit install (32bit not tested) resulting in mkfs.btrfs refusing to load. Proposed solution: add Package: liblzo2-2 (2.06-1) amd64 to /cdrom/pool Many thanks.