Bug Description :  Failed to fetch   http://packages.linuxmint.com/dists/isadora/Release   (malformed Release  file?) Unable to find expected entry  multiverse/binary-i386/Packages in  Meta-index file Some index files failed to download, they have been  ignored, or old ones used instead.         Reasoning and Solution  : There is no multiverse section in the Mint repository... please edit your /etc/apt/sources.list and remove the "multiverse" keyword from the lines referring to the Mint repositories.           How to Fix it:      This command will open the sources list.     ~$ sudo gedit /etc/apt/sources.list     This is my file before editing and after editing         Before :-         deb http://packages.linuxmint.com/ isadora main upstream import multiverse import     deb http://archive.ubuntu.com/ubuntu/ lucid main restricted universe multiverse     deb http://archive.ubuntu.com/ubuntu/ lucid-updates main restricted universe multiverse     deb http://security.ubuntu.com...