Stimmt, konnte es jetzt über einen älteren Snapshot lösen - Danke für den Tip!
Ein System läuft wieder. Das andere möchte libxv1 immer wieder updaten...
vdr1> apt-get update && apt-get dist-upgrade
Get:1 http://www.minidvblinux.de/download/5.4/files testing InRelease [2.179 B]
Fetched 2.179 B in 0s (15,7 kB/s)
Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
libxv1
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/9.884 B of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 17619 files and directories currently installed.)
Preparing to unpack .../libxv1_1.0.11-~2_amd64.deb ...
Unpacking libxv1 (1.0.11-~2) over (1.0.11-~2) ...
Setting up libxv1 (1.0.11-~2) ...
vdr1> apt-get update && apt-get dist-upgrade
Get:1 http://www.minidvblinux.de/download/5.4/files testing InRelease [2.179 B]
Fetched 2.179 B in 0s (14,6 kB/s)
Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
libxv1
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/9.884 B of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 17619 files and directories currently installed.)
Preparing to unpack .../libxv1_1.0.11-~2_amd64.deb ...
Unpacking libxv1 (1.0.11-~2) over (1.0.11-~2) ...
Setting up libxv1 (1.0.11-~2) ...
Komisch!?