Arquivo PostScript Aleatório na minha pasta pessoal

Question

Hoje eu instalei o Xubuntu 14.04 na minha máquina. Eu configurei um programa e uma ferramenta diferente.

Mas quando clico com o botão direito do mouse em um arquivo, na linha "Abrir com", vejo uma célula vazia:

Quandoeuclico,apareceumponteirocruzadodomousequeeupossoarrastarnatela.Pararetornaraomousepadrão,clicoduasvezesnajanela.

AsimagensPostScriptaparecemnaminhapastapessoal( screenshot aqui ). Essas imagens são como capturas de tela da visualização quando clicamos na linha em branco.

Como resolver isso? Posso apagar a linha em branco na opção 'Abrir com'?

EDITAR:

Como sugerido, esta é a saída de grep -r 'text/x-python' ~/.local/share/applications :

/home/tree/.local/share/applications/userapp-atom_loader.py-8NH4XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-atom-2Y34XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-python-H5O7XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-%f-MEQYXX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-%f-5U2UXX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-atom-M739XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-atom-l.sh-SA27XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-atom-l.sh-EJT5XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-dj-py.py-VM06XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-python-VGY5XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-atom-KVDDYX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-ip.py-XFIWXX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-python atom_loader.py-O0W4XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-sudo reboot-FDOUXX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/mimeapps.list:text/x-python=menulibre-sublime-text-2.desktop;
/home/tree/.local/share/applications/userapp-atom_loader.py-6UNFYX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-%f-7ZQCYX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-atom-J8IFYX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-%f-MO9EYX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-ip.py-UYFVXX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-atom-l.sh-MR2UXX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-dj-py.py-YAR4XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-python-5XZ4XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/userapp-atom-9Y73XX.desktop:MimeType=text/x-python
/home/tree/.local/share/applications/mimeinfo.cache:text/x-python=userapp-python atom_loader.py-HABUXX.desktop;userapp-atom-9Y73XX.desktop;userapp-python-5XZ4XX.desktop;userapp-dj-py.py-YAR4XX.desktop;userapp-atom-l.sh-MR2UXX.desktop;userapp-ip.py-UYFVXX.desktop;userapp-%f-MO9EYX.desktop;userapp-atom-J8IFYX.desktop;userapp-%f-7ZQCYX.desktop;userapp-atom_loader.py-6UNFYX.desktop;userapp-sudo reboot-FDOUXX.desktop;userapp-python atom_loader.py-O0W4XX.desktop;userapp-ip.py-XFIWXX.desktop;userapp-atom-KVDDYX.desktop;userapp-python-VGY5XX.desktop;userapp-dj-py.py-VM06XX.desktop;userapp-atom-l.sh-EJT5XX.desktop;userapp-atom-l.sh-SA27XX.desktop;userapp-atom-M739XX.desktop;userapp-%f-5U2UXX.desktop;userapp-%f-MEQYXX.desktop;userapp-python-H5O7XX.desktop;userapp-atom-2Y34XX.desktop;userapp-atom_loader.py-8NH4XX.desktop;
/home/tree/.local/share/applications/userapp-python atom_loader.py-HABUXX.desktop:MimeType=text/x-python

Esta é a saída de mimetype dj-py.py :

dj-py.py: text/x-python

Nenhuma saída para grep -r 'text/x-python' /usr/share/applications