jockey-gtk crashed with AttributeError in enabled()

[Briceparent]

Hello!
I've just updated my Hard Haron. Then, i had to restart my computer (i think there was a kernel update).
Rebooting took more than 3 minutes (most of the time with the ubuntu picture, at the biggining of the loading bar), and the disks were checked. Once logged in, i had no sound, and a message told me that there was a problem with GStreamer, or that i didn't have a sound card. I do have one, and before the update, it used to work. The soundcard i have is on the Asus MotherBoard (P5B SE).
I then tried to check the proprietary drivers (i have a Nvidia 8600GTX videocard), but i can't open the window, because of the problem written in this bug title. (Jockey-gtk).
I've tried to reboot another time, but it's always very slow, the disks are still checked, and i still don't have sound.

Thank you for all the work you make!

ProblemType: Crash
Architecture: i386
Date: Fri Apr 11 22:25:12 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/bin/jockey-gtk
InterpreterPath: /usr/bin/python2.5
NonfreeKernelModules: nvidia
Package: jockey-gtk 0.3.3-0ubuntu7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/jockey-gtk
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/bin
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/jockey-gtk']
SourcePackage: jockey
Title: jockey-gtk crashed with AttributeError in enabled()
Uname: Linux 2.6.24-16-generic i686
UserGroups: