it doesn't work on gnome shell

[Juan Simón]

When I try to edit or add new entries:

$ alacarte
Traceback (most recent call last):
  File "/usr/share/alacarte/Alacarte/MainWindow.py", line 311, in on_new_item_button_clicked
    process = subprocess.Popen(['gnome-desktop-item-edit', file_path], env=os.environ)
  File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1239, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: alacarte 0.13.2-2ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-16.25-i7 3.2.6
Uname: Linux 3.2.0-16-i7 x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Thu Feb 23 09:17:53 2012
PackageArchitecture: all
SourcePackage: alacarte
UpgradeStatus: No upgrade log present (probably fresh install)