I try to change my Unity to gnome shell (sudo apt-get install gnome-shell).
But I receive an error file not found for three files as listed below:

Err http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu/ raring/main gir1.2-mutter-3.0 i386 3.8.2-0ubuntu1~raring1
404 Not Found
Err http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu/ raring/main gnome-shell-common all 3.8.2-0ubuntu1~raring1
404 Not Found
Err http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu/ raring/main gnome-shell i386 3.8.2-0ubuntu1~raring1
404 Not Found

Did anyone get those error or just me?
Other files are downloaded successfully.