OSX application crashs at opening (worked fine a minute ago..)

Hello, I have been working with Inkscape on many Mac and I never had major problems.
I was working on it today for few hours. I saved my file and closed inkscape. Impossible to reopen it since then.

I am on Mac Pro with OS X 10.6.4

Bellow is what the terminal tells (tells a lot..):
What should I do ? I tried to reinstall Inkscape but it's the same.

Last login: Mon Sep 20 17:56:57 on console
/Applications/Inkscape.app/Contents/MacOS/Inkscape ; exit;
Mac-Pro-de-Inflammable-Productions:~ inflammable$ /Applications/Inkscape.app/Contents/MacOS/Inkscape ; exit;
Warning: AppleCollationOrder setting not found, using AppleLocale.
Setting Language: fr_FR.UTF-8
Xlib: extension "RANDR" missing on display "/tmp/launch-ITGse1/org.x:0".
/Users/inflammable/.inkscape-etc/gtkrc:56: Clearlooks configuration option "menuitemstyle" is not supported and will be ignored.
/Users/inflammable/.inkscape-etc/gtkrc:57: Clearlooks configuration option "listviewitemstyle" is not supported and will be ignored.
/Users/inflammable/.inkscape-etc/gtkrc:58: Clearlooks configuration option "progressbarstyle" is not supported and will be ignored.

(inkscape-bin:376): Gtk-WARNING **: Could not find the icon 'object-visible'. The 'hicolor' theme
was not found either, perhaps you need to install it.
You can get a copy from:
 http://icon-theme.freedesktop.org/releases

Emergency save activated!
Emergency save completed. Inkscape will close now.
If you can reproduce this crash, please file a bug at www.inkscape.org
with a detailed description of the steps leading to the crash, so we can fix it.
logout

[Opération terminée]