ion3 cannot find fonts in edgy

I installed ion3, but it is broken in edgy.

Ion startup error log:
>> Could not load font "-*-helvetica-medium-r-normal-*-12-*-*-*-*-*-*-*", trying "fixed"
>> Failed to load fallback font.
>> Stack trace:
   0 [C]: in 'defstyle'
   1 /etc/X11/ion3/look.lua:49
     [Skipping unnamed C functions.]
>> Could not load font "-*-helvetica-medium-r-normal-*-17-*-*-*-*-*-*-*", trying "fixed"
>> Failed to load fallback font.
>> Stack trace:
   0 [C]: in 'defstyle'
   1 /etc/X11/ion3/look.lua:78
     [Skipping unnamed C functions.]
>> Could not load font "-misc-fixed-medium-r-*-*-13-*-*-*-*-60-*-*", trying "fixed"
>> Failed to load fallback font.
>> Stack trace:
   0 [C]: in 'defstyle'
   1 /etc/X11/ion3/lookcommon_clean.lua:3
     [Skipping unnamed C functions.]
   4 [C]: in 'dopath'
   5 /etc/X11/ion3/look.lua:106
     [Skipping unnamed C functions.]

Some background info:

$ apt-cache policy ion3
ion3:
  Installed: 20060524-3
  Candidate: 20060524-3
  Version table:
 *** 20060524-3 0
        500 http://us.archive.ubuntu.com edgy/universe Packages
        100 /var/lib/dpkg/status

$ dpkg --get-selections | grep fonts
gsfonts install
gsfonts-x11 install
sun-java5-fonts install
ttf-bengali-fonts install
ttf-devanagari-fonts install
ttf-gujarati-fonts install
ttf-indic-fonts install
ttf-kannada-fonts install
ttf-malayalam-fonts install
ttf-oriya-fonts install
ttf-punjabi-fonts install
ttf-tamil-fonts install
ttf-telugu-fonts install
xfonts-100dpi install
xfonts-75dpi install
xfonts-base install
xfonts-encodings install
xfonts-scalable install
xfonts-utils install
xfontsel install
xlsfonts install

$ pidof xfs
4324