Hi, I see now the same issue within backports:
blackbox:~# apt-get upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done The following packages have been kept back: ffmpeg libavdevice57 libavfilter6 libavformat57 librecad librecad-data 0 upgraded, 0 newly installed, 0 to remove and 6 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue? [Y/n] Setting up qemu-user-static (1:2.7+dfsg-3~bpo8+1) ... update-binfmts: warning: unable to close /proc/sys/fs/binfmt_misc/register: Invalid argument update-binfmts: warning: unable to enable binary format qemu-mips update-binfmts: exiting due to previous errors dpkg: error processing package qemu-user-static (--configure): subprocess installed post-installation script returned error exit status 2 Errors were encountered while processing: qemu-user-static E: Sub-process /usr/bin/dpkg returned an error code (1) blackbox:~# on a stable system. Since it breaks the package on stable-backports I would think the severity of the issue should be raised, such that apt-listbugs has a chance to report it. Thanks Rainer -- Rainer Dorsch http://bokomoko.de/