Gwenview restarts lightdm if trying to open a 8000X8000 jpg image (17 Mo)

Problem reproducible:

A JPG Image with the following attributes:

- Resolution : 8000 X 8000
- Size: 17.5 Mo.

1- DOuble click on the image to open in the default image viewer (Gwenview)
2- Gwenview breaks before opening without any error message
3- Systematically, all process are killed and user session is restarted (lightdm).

------------------
Used the same image with lower resolution (1920X1920): No bug.
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gwenview:
  Installed: 4:4.7.4-0ubuntu0.1
  Candidate: 4:4.7.4-0ubuntu0.1
  Version table:
 *** 4:4.7.4-0ubuntu0.1 0
        500 http://fr.archive.ubuntu.com/ubuntu/ oneiric-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     4:4.7.1-0ubuntu2 0
        500 http://fr.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages

Ubuntu : 11.10 (3.0.0-15-generic #26-Ubuntu SMP Fri Jan 20 17:23:00 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux).

DEsktop Manager: Unity.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gwenview 4:4.7.4-0ubuntu0.1
ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13
Uname: Linux 3.0.0-15-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Sat Jan 28 09:12:52 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: gwenview
UpgradeStatus: No upgrade log present (probably fresh install)