Package: thunar
Version: 1.0.2-1+b2
Thunar don't use the proper icon for "python script". (MIME-type icon)
In the theme in use there's:
mimetypes/gnome-mime-application-x-python.svg
Debian testing, with kernel verson 2.6.32-5-686; libc6-i686 version: 2.11.2-6