package libsane 1.0.23-3ubuntu3.1 [modified: lib/udev/rules.d/40-libsane.rules] failed to install/upgrade: poging tot overschrijven van gedeelde '/lib/udev/rules.d/40-libsane.rules', dat verschilt van andere exemplaren van pakket libsane:i386

[Hans van der Vleugel]

trying to install pipelight in order to use this silverlight substitute.
(cf. http://www.makeuseof.com/tag/easily-enable-silverlight-watch-netflix-linux/
ubuntu 14.04 LTS

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libsane 1.0.23-3ubuntu3.1 [modified: lib/udev/rules.d/40-libsane.rules]
ProcVersionSignature: Ubuntu 3.13.0-93.140-generic 3.13.11-ckt39
Uname: Linux 3.13.0-93-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
Date: Fri Aug 12 22:25:03 2016
DuplicateSignature: package:libsane:1.0.23-3ubuntu3.1 [modified: lib/udev/rules.d/40-libsane.rules]:poging tot overschrijven van gedeelde '/lib/udev/rules.d/40-libsane.rules', dat verschilt van andere exemplaren van pakket libsane:i386
ErrorMessage: poging tot overschrijven van gedeelde '/lib/udev/rules.d/40-libsane.rules', dat verschilt van andere exemplaren van pakket libsane:i386
InstallationDate: Installed on 2016-02-27 (167 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.7
 apt 1.0.1ubuntu2.14
SourcePackage: sane-backends
Title: package libsane 1.0.23-3ubuntu3.1 [modified: lib/udev/rules.d/40-libsane.rules] failed to install/upgrade: poging tot overschrijven van gedeelde '/lib/udev/rules.d/40-libsane.rules', dat verschilt van andere exemplaren van pakket libsane:i386
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.sane.d.dll.conf: 2016-02-28T15:54:30.951947