fontconfig: fails to disable autohinter once enabled

[Alessandro]

Package: fontconfig
Version: 2.2.2-2ubuntu3
Severity: normal

Once that fontconfig has autohinter enabled via dpkg-reconfigure, one
cannot disable the autohinter neither with dpkg-reconfigure nor editing
/etc/fonts/local.conf - because infos about autohinter are just commented
out in local.conf but autohint is however used by Gnome even after the
changes.
Warty system.

-- System Information:
Debian Release: testing/unstable
Architecture: i386 (i686)
Kernel: Linux 2.6.8.1-3-k7
Locale: LANG=it_IT, LC_CTYPE=it_IT

Versions of packages fontconfig depends on:
ii  debconf [debconf-2 1.4.29ubuntu4         Debian configuration management sy
ii  defoma             0.11.8ubuntu1         Debian Font Manager -- automatic f
ii  gsfonts-x11        0.17                  Make Ghostscript fonts available t
ii  laptop-detect      0.9                   attempt to detect a laptop
ii  libc6              2.3.2.ds1-13ubuntu2.2 GNU C Library: Shared libraries an
ii  libfontconfig1     2.2.2-2ubuntu3        generic font configuration library
ii  msttcorefonts      1.1.11                Installer for Microsoft TrueType c
ii  ttf-bitstream-vera 1.10-3                The Bitstream Vera family of free 
ii  ttf-freefont       20031008-1.1          Freefont Serif, Sans and Mono True
ii  ucf                1.07                  Update Configuration File: preserv

-- debconf information:
* fontconfig/subpixel_rendering: false
* fontconfig/enable_bitmaps: true
* fontconfig/enable_autohinter: true