Crash'ы после установки кубунты

Такие крэши, как "Что-то закрылось unexpectedly" выскакивают на бете довольно регулярно, лечится обновлениями.
Вы приведите здесь содержимое файла /etc/apt/sources.list

Открываем sources.list и смотрим что там за проблемы в 5-той строке. Исправляем, и сохраняемся.

Затем подключаемся к интернету и обновляемся.

sudo aptitude update
sudo aptitude full-upgrade

А для установки Firefox-а в 9.10 специально графический установщик даже сделали. В поиске меню набери firefox и все увидишь.

вот текст файла:

# deb cdrom:[Kubuntu 9.10 _Karmic Koala_ - Beta i386 (20090929.2)]/ karmic main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to                
# newer versions of the distribution.

deb karmic main restricted
deb-src karmic main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb karmic-updates main restricted
deb-src karmic-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb karmic universe
deb-src karmic universe
deb karmic-updates universe
deb-src karmic-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb karmic multiverse
deb-src karmic multiverse
deb karmic-updates multiverse
deb-src karmic-updates multiverse

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb http://ua.archive.ubuntu.com/ubuntu/ karmic-backports main restricted universe multiverse
# deb-src http://ua.archive.ubuntu.com/ubuntu/ karmic-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu karmic partner
# deb-src http://archive.canonical.com/ubuntu karmic partner

deb karmic-security main restricted
deb-src karmic-security main restricted
deb karmic-security universe
deb-src karmic-security universe
deb karmic-security multiverse
deb http://ua.archive.ubuntu.com/ubuntu/ karmic main universe restricted multiverse
deb-src karmic-security multiverse в чём трабл - не знаю.

а на счёт инсталятора огнелиса - вылетает всё тот же эррор с питоном.

Замените все содержимое на вот это:
#deb cdrom:[Kubuntu 9.10 _Karmic Koala_ - Beta amd64 (20090929.2)]/ karmic main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to                
# newer versions of the distribution.                                                    

deb http://ru.archive.ubuntu.com/ubuntu/ karmic main restricted
deb-src http://ru.archive.ubuntu.com/ubuntu/ karmic main restricted

## Major bug fix updates produced after the final release of the
## distribution.                                               
deb http://ru.archive.ubuntu.com/ubuntu/ karmic-updates main restricted
deb-src http://ru.archive.ubuntu.com/ubuntu/ karmic-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any 
## review or updates from the Ubuntu security team.                       
deb http://ru.archive.ubuntu.com/ubuntu/ karmic universe                  
deb-src http://ru.archive.ubuntu.com/ubuntu/ karmic universe              
deb http://ru.archive.ubuntu.com/ubuntu/ karmic-updates universe          
deb-src http://ru.archive.ubuntu.com/ubuntu/ karmic-updates universe      

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://ru.archive.ubuntu.com/ubuntu/ karmic multiverse
deb-src http://ru.archive.ubuntu.com/ubuntu/ karmic multiverse
deb http://ru.archive.ubuntu.com/ubuntu/ karmic-updates multiverse
deb-src http://ru.archive.ubuntu.com/ubuntu/ karmic-updates multiverse

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb http://ru.archive.ubuntu.com/ubuntu/ karmic-backports main restricted universe multiverse
# deb-src http://ru.archive.ubuntu.com/ubuntu/ karmic-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu karmic partner
# deb-src http://archive.canonical.com/ubuntu karmic partner

deb http://security.ubuntu.com/ubuntu karmic-security main restricted
deb-src http://security.ubuntu.com/ubuntu karmic-security main restricted
deb http://security.ubuntu.com/ubuntu karmic-security universe
deb-src http://security.ubuntu.com/ubuntu karmic-security universe
deb http://security.ubuntu.com/ubuntu karmic-security multiverse
deb-src http://security.ubuntu.com/ubuntu karmic-security multiverse

Спасибо!
Даже после замены файла питон заработал, без обновления!

такая же ерунда произошла. но система не дает перезаписать файл. как открыть его так, чтоб можно было редактировать?
решено :)