Bug#518250: [nautilus] png files don't open - file type "png document" but contents of "PNG image"

[Jordi Burguet-Castell]

Package: nautilus
Version: 2.20.0-7
Severity: normal

--- Please enter the report below this line. ---

Nautilus will not open png files (unless right-clicking and selecting
"Open With..."), claiming the following:

"""
The filename "hoftmon-working.png" indicates that this file is of type
"png document". The contents of the file indicate that the file is of
type "PNG image". If you open this file, the file might present a
security risk to your system.

Do not open the file unless you created the file yourself, or received
the file from a trusted source. To open the file, rename the file to the
correct extension for "PNG image", then open the file normally.
Alternatively, use the Open With menu to choose a specific application
for the file.
"""


--- System information. ---
Architecture: amd64
Kernel:       Linux 2.6.26-1-amd64

Debian Release: squeeze/sid
   500 unstable        ftp.us.debian.org
   500 testing         security.debian.org
   500 oldstable       debian-multimedia.org

--- Package information. ---
Depends                           (Version) | Installed
===========================================-+-===============
libart-2.0-2                    (>= 2.3.18) | 2.3.20-2
libatk1.0-0                     (>= 1.20.0) | 1.24.0-2
libbonobo2-0                    (>= 2.15.0) | 2.24.0-2
libc6                            (>= 2.7-1) | 2.9-4
libcairo2                        (>= 1.2.4) | 1.8.6-2
libeel2-2.20                                | 2.20.0-7
libesd0                        (>= 0.2.35)  | 0.2.41-2
  OR libesd-alsa0                (>= 0.2.35) |
libexempi3                                  | 2.1.0-3
libexif12                                   | 0.6.16-2.1
libgail-common                  (>= 1.10.1) | 2.14.7-4
libgail18                       (>= 1.10.1) | 2.14.7-4
libgconf2-4                     (>= 2.13.5) | 2.24.0-7
libglade2-0                    (>= 1:2.6.1) | 1:2.6.3-1
libglib2.0-0                    (>= 2.16.0) | 2.18.4-2
libgnome-desktop-2              (>= 2.22.0) | 2.22.3-2
libgnome2-0                     (>= 2.17.3) | 2.24.1-2
libgnomecanvas2-0               (>= 2.11.1) | 2.20.1.1-1
libgnomeui-0                    (>= 2.17.1) | 2.24.0-2
libgnomevfs2-0               (>= 1:2.17.90) | 1:2.24.0-2
libgtk2.0-0                     (>= 2.12.0) | 2.14.7-4
libnautilus-extension1         (>= 2.17.90) | 2.20.0-7
liborbit2                    (>= 1:2.14.10) | 1:2.14.16-0.1
libpango1.0-0                   (>= 1.20.3) | 1.22.4-2
librsvg2-2                      (>= 2.18.1) | 2.22.3-2
libselinux1                     (>= 2.0.59) | 2.0.71-1
libstartup-notification0         (>= 0.8-1) | 0.9-1
libtrackerclient0                (>= 0.6.2) | 0.6.90-3
libx11-6                                    | 2:1.1.5-2
libxml2                         (>= 2.6.27) | 2.7.3.dfsg-1
nautilus-data                     (>= 2.20) | 2.20.0-7
nautilus-data                     (<< 2.21) | 2.20.0-7
shared-mime-info                            | 0.60-2
gnome-control-center               (>= 2.6) | 1:2.22.2.1-2
desktop-file-utils                 (>= 0.7) | 0.15-1