okular/libepub is unable to read valid epub files

[Thomas Nemeth]

   I use a script that creates ePub files. These files pass all tests from epubcheck
and can be read from calibre and fbreader without any problem. However Okular
does not seem to be able to read them.

Starting okular on the command line shows debug output from libepub as shown
in attachments. The point seems to be that libepub does not handle relative paths
in the document structure description files
 (eg : OEBPS/elements/../chapters/1.xhtml - No such file)

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: libepub0 0.2.1-2build1
ProcVersionSignature: Ubuntu 3.2.0-84.121-generic-pae 3.2.68
Uname: Linux 3.2.0-84-generic-pae i686
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: i386
Date: Tue May 19 08:17:41 2015
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MarkForUpload: True
ProcEnviron:
 SHELL=/bin/bash
 TERM=xterm
 PATH=(custom, user)
 LANG=fr_FR.UTF-8
 LANGUAGE=fr_FR
SourcePackage: ebook-tools
UpgradeStatus: No upgrade log present (probably fresh install)

[Thomas Nemeth (tnemeth)]

Here is the test file that produced the output in the report.