Bug#692497: gnome-system-monitor: preferences not remembered

[Il Pillo]

Package: gnome-system-monitor
Version: 3.4.1-2+b1
Severity: normal

Dear Maintainer,

I found a bug in gnome-system-monitor 3.4.1,
in short, the columns shown in "Processes" and "File Systems" tabs in some
cases aren't remembered correctly.
Steps to reproduce the bug:

open menu Edit -> Preferences
select File System tab
unchek the first item "Device" from the list
Close the preferences window
Close System Monitor

now:

reopen System Monitor
select Processes tab,
bug 1) as you can see the "process name" column is disappeared
bug 2) select File Systems tab: the Device column is visible




-- System Information:
Debian Release: wheezy/sid
  APT prefers testing-proposed-updates
  APT policy: (500, 'testing-proposed-updates'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash

Versions of packages gnome-system-monitor depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.12.1-2
ii  libc6                                        2.13-35
ii  libcairo2                                    1.12.2-2
ii  libgcc1                                      1:4.7.1-7
ii  libgdk-pixbuf2.0-0                           2.26.1-1
ii  libglib2.0-0                                 2.33.12+really2.32.4-3
ii  libglibmm-2.4-1c2a                           2.32.1-1
ii  libgtk-3-0                                   3.4.2-4
ii  libgtkmm-3.0-1                               3.4.2-1
ii  libgtop2-7                                   2.28.4-3
ii  libpango1.0-0                                1.30.0-1
ii  librsvg2-2                                   2.36.1-1
ii  libsigc++-2.0-0c2a                           2.2.10-0.2
ii  libstdc++6                                   4.7.1-7
ii  libwnck-3-0                                  3.4.2-1
ii  libxml2                                      2.8.0+dfsg1-6

Versions of packages gnome-system-monitor recommends:
ii  gvfs  1.12.3-1+b1

gnome-system-monitor suggests no packages.

-- debconf information:
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LANG = "en_US.utf8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory