Originally Posted by alecz20
Solution (Karmic): Open HOME folder and show hidden files, open .local/share/applications and edit mimeapps.list under [Added Associations].
Delete inode entries from end ";" to previous ";" leaving no double ;;
Save and exit.
Note: This will create a backup file "mimeapps.list~" you can delete that if you wish.
Should look similar to this: