Why does Alacarte give me this error when I try to add items to the menu?

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http://askubuntu.com – When I try to add anything to the menu in 12.04 I get this error. $ alacarte Traceback (most recent call last): File "/usr/share/alacarte/Alacarte/MainWindow.py", line 317, 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 1249, in _execute_child raise child_exception OSError: [Errno 2] No such file or directory Thank you, R.C. (HowTos)