O número 3 não é exibido no applet de relógio do painel

Question

Veja a imagem. É assim que a hora atual é exibida - o '3' de '13: 39: 22 'e' 2:57:31 pm 'está faltando ... Alguma idéia de como corrigir isso?

(parece ter começado ontem após a última atualização).

Relógio no horário '13: 49: 22 ':

Relógionohorário'2:57:31pm':

Lista de fontes apt em uso (poderia fazer com uma limpeza, eu acho.):

user@host:~$ grep ^ /etc/apt/sources.list /etc/apt/sources.list.d/* -h
deb http://de.archive.ubuntu.com/ubuntu/ quantal main restricted universe multiverse
deb http://de.archive.ubuntu.com/ubuntu/ quantal-updates main restricted universe multiverse
deb http://de.archive.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu/ quantal-security main restricted universe multiverse

deb http://extras.ubuntu.com/ubuntu/ quantal main
deb http://dl.google.com/linux/talkplugin/deb/ stable main
deb http://dl.google.com/linux/talkplugin/deb/ stable main
deb http://dl.google.com/linux/talkplugin/deb/ stable main
deb http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu quantal main
deb-src http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu quantal main
deb http://archive.canonical.com/ubuntu quantal partner #Added by software-center
deb http://archive.canonical.com/ubuntu precise partner #Added by software-center
deb http://archive.canonical.com/ubuntu quantal partner #Added by software-center
deb http://ppa.launchpad.net/scopes-packagers/ppa/ubuntu precise main
deb http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu quantal main
deb-src http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu quantal main
deb http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu quantal main
deb-src http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu quantal main