This update cuased the problem:

Start-Date: 2012-04-13  16:33:06
Commandline: aptdaemon role='role-commit-packages' sender=':1.59'
Upgrade: libsmbclient:amd64 (3.6.3-2ubuntu1, 3.6.3-2ubuntu2), apt-transport-https:amd64 (0.8.16~exp12ubuntu7, 0.8.16~exp12ubuntu8), ubuntu-desktop:amd64 (1.265, 1.266), libical0:amd64 (0.48-1ubuntu2, 0.48-1ubuntu3), gir1.2-dbusmenu-gtk-0.4:amd64 (0.6.1-0ubuntu1, 0.6.1-0ubuntu2), ubuntu-standard:amd64 (1.265, 1.266), libc-bin:amd64 (2.15-0ubuntu6, 2.15-0ubuntu7), gir1.2-gstreamer-0.10:amd64 (0.10.36-1, 0.10.36-1ubuntu1), metacity:amd64 (2.34.1-1ubuntu10, 2.34.1-1ubuntu11), libunity9:amd64 (5.8.0-0ubuntu1, 5.10.0-0ubuntu1), compiz-plugins-default:amd64 (0.9.7.4-0ubuntu3, 0.9.7.6-0ubuntu1), bind9-host:amd64 (9.8.1.dfsg.P1-2, 9.8.1.dfsg.P1-3), gvfs-fuse:amd64 (1.12.0-0ubuntu5, 1.12.0-0ubuntu6), libgnome-desktop-3-2:amd64 (3.4.0-0ubuntu3, 3.4.0-0ubuntu4), gnome-session-bin:amd64 (3.2.1-0ubuntu6, 3.2.1-0ubuntu7), python-minimal:amd64 (2.7.2-9ubuntu6, 2.7.3-0ubuntu1), gwibber-service-identica:amd64 (3.4.0-0ubuntu3, 3.4.0-0ubuntu4), smbclient:amd64 (3.6.3-2ubuntu1, 3.6.3-2ubuntu2), liblaunchpad-integration-common:amd64 (0.1.54build1, 0.1.56), libgck-1-0:amd64 (3.2.2-2ubuntu3, 3.2.2-2ubuntu4), dnsutils:amd64 (9.8.1.dfsg.P1-2, 9.8.1.dfsg.P1-3), gvfs-backends:amd64 (1.12.0-0ubuntu5, 1.12.0-0ubuntu6), liblaunchpad-integration-3.0-1:amd64 (0.1.54build1, 0.1.56), udisks:amd64 (1.0.4-5ubuntu1, 1.0.4-5ubuntu2), gnome-settings-daemon:amd64 (3.4.0-0ubuntu6, 3.4.0-0ubuntu7), gir1.2-dbusmenu-glib-0.4:amd64 (0.6.1-0ubuntu1, 0.6.1-0ubuntu2), unity-scope-musicstores:amd64 (5.8.0-0ubuntu1, 5.10.0-0ubuntu1), libnm-util2:amd64 (0.9.4.0-0ubuntu2, 0.9.4.0-0ubuntu3), libdee-1.0-4:amd64 (1.0.8-0ubuntu2, 1.0.10-0ubuntu1), gnome-session:amd64 (3.2.1-0ubuntu6, 3.2.1-0ubuntu7), gnome-session-common:amd64 (3.2.1-0ubuntu6, 3.2.1-0ubuntu7), libutouch-geis1:amd64 (2.2.8-0ubuntu1, 2.2.9-0ubuntu1), gvfs-libs:amd64 (1.12.0-0ubuntu5, 1.12.0-0ubuntu6), libgcr-3-1:amd64 (3.2.2-2ubuntu3, 3.2.2-2ubuntu4), libdns81:amd64 (9.8.1.dfsg.P1-2, 9.8.1.dfsg.P1-3), gwibber-service-twitter:amd64 (3.4.0-0ubuntu3, 3.4.0-0ubuntu4), gwibber-service-facebook:amd64 (3.4.0-0ubuntu3, 3.4.0-0ubuntu4), libwbclient0:amd64 (3.6.3-2ubuntu1, 3.6.3-2ubuntu2), xdg-user-dirs:amd64 (0.14-0ubuntu1, 0.14-0ubuntu2), checkbox:amd64 (0.13.6, 0.13.7), gvfs-bin:amd64 (1.12.0-0ubuntu5, 1.12.0-0ubuntu6), gnome-keyring:amd64 (3.2.2-2ubuntu3, 3.2.2-2ubuntu4), gvfs-common:amd64 (1.12.0-0ubuntu5, 1.12.0-0ubuntu6), libapt-inst1.4:amd64 (0.8.16~exp12ubuntu7, 0.8.16~exp12ubuntu8), ubuntu-minimal:amd64 (1.265, 1.266), nvidia-current-updates:amd64 (295.33-0ubuntu1, 295.40-0ubuntu1), shared-mime-info:amd64 (1.0-0ubuntu3, 1.0-0ubuntu4), gnome-desktop3-data:amd64 (3.4.0-0ubuntu3, 3.4.0-0ubuntu4), unity-lens-music:amd64 (5.8.0-0ubuntu1, 5.10.0-0ubuntu1), metacity-common:amd64 (2.34.1-1ubuntu10, 2.34.1-1ubuntu11), libisccc80:amd64 (9.8.1.dfsg.P1-2, 9.8.1.dfsg.P1-3), apt-utils:amd64 (0.8.16~exp12ubuntu7, 0.8.16~exp12ubuntu8), update-manager:amd64 (0.156.10, 0.156.11), update-manager-core:amd64 (0.156.10, 0.156.11), linux-firmware:amd64 (1.78, 1.79), samba-common:amd64 (3.6.3-2ubuntu1, 3.6.3-2ubuntu2), apt:amd64 (0.8.16~exp12ubuntu7, 0.8.16~exp12ubuntu8), network-manager:amd64 (0.9.4.0-0ubuntu2, 0.9.4.0-0ubuntu3), launchpad-integration:amd64 (0.1.54build1, 0.1.56), unity-lens-files:amd64 (5.8.0-0ubuntu1, 5.10.0-0ubuntu1), liblwres80:amd64 (9.8.1.dfsg.P1-2, 9.8.1.dfsg.P1-3), gir1.2-unity-5.0:amd64 (5.8.0-0ubuntu1, 5.10.0-0ubuntu1), libdbusmenu-glib4:amd64 (0.6.1-0ubuntu1, 0.6.1-0ubuntu2), libnm-glib-vpn1:amd64 (0.9.4.0-0ubuntu2, 0.9.4.0-0ubuntu3), python:amd64 (2.7.2-9ubuntu6, 2.7.3-0ubuntu1), multiarch-support:amd64 (2.15-0ubuntu6, 2.15-0ubuntu7), libgwibber2:amd64 (3.4.0-0ubuntu3, 3.4.0-0ubuntu4), libnm-glib4:amd64 (0.9.4.0-0ubuntu2, 0.9.4.0-0ubuntu3), libdbusmenu-gtk4:amd64 (0.6.1-0ubuntu1, 0.6.1-0ubuntu2), libdbusmenu-gtk3-4:amd64 (0.6.1-0ubuntu1, 0.6.1-0ubuntu2), compiz-gnome:amd64 (0.9.7.4-0ubuntu3, 0.9.7.6-0ubuntu1), dpkg:amd64 (1.16.1.2ubuntu6, 1.16.1.2ubuntu7), libbind9-80:amd64 (9.8.1.dfsg.P1-2, 9.8.1.dfsg.P1-3), libapt-pkg4.12:amd64 (0.8.16~exp12ubuntu7, 0.8.16~exp12ubuntu8), gwibber-service:amd64 (3.4.0-0ubuntu3, 3.4.0-0ubuntu4), libdecoration0:amd64 (0.9.7.4-0ubuntu3, 0.9.7.6-0ubuntu1), libisccfg82:amd64 (9.8.1.dfsg.P1-2, 9.8.1.dfsg.P1-3), whoopsie:amd64 (0.1.30, 0.1.31), libc6-dev:amd64 (2.15-0ubuntu6, 2.15-0ubuntu7), apparmor:amd64 (2.7.102-0ubuntu2, 2.7.102-0ubuntu3), gir1.2-launchpad-integration-3.0:amd64 (0.1.54build1, 0.1.56), gstreamer0.10-tools:amd64 (0.10.36-1, 0.10.36-1ubuntu1), gir1.2-dee-1.0:amd64 (1.0.8-0ubuntu2, 1.0.10-0ubuntu1), checkbox-qt:amd64 (0.13.6, 0.13.7), gvfs:amd64 (1.12.0-0ubuntu5, 1.12.0-0ubuntu6), libgcr-3-common:amd64 (3.2.2-2ubuntu2, 3.2.2-2ubuntu4), samba-common-bin:amd64 (3.6.3-2ubuntu1, 3.6.3-2ubuntu2), gwibber:amd64 (3.4.0-0ubuntu3, 3.4.0-0ubuntu4), libxi6:amd64 (1.6.0-0ubuntu1, 1.6.0-0ubuntu2), libc-dev-bin:amd64 (2.15-0ubuntu6, 2.15-0ubuntu7), libisc83:amd64 (9.8.1.dfsg.P1-2, 9.8.1.dfsg.P1-3), unity-lens-applications:amd64 (5.8.0-0ubuntu1, 5.10.0-0ubuntu1), compiz-core:amd64 (0.9.7.4-0ubuntu3, 0.9.7.6-0ubuntu1), mountall:amd64 (2.35, 2.36), libmetacity-private0:amd64 (2.34.1-1ubuntu10, 2.34.1-1ubuntu11), libc6:amd64 (2.15-0ubuntu6, 2.15-0ubuntu7), libgstreamer0.10-0:amd64 (0.10.36-1, 0.10.36-1ubuntu1), libgwibber-gtk2:amd64 (3.4.0-0ubuntu3, 3.4.0-0ubuntu4), libpam-gnome-keyring:amd64 (3.2.2-2ubuntu3, 3.2.2-2ubuntu4), light-themes:amd64 (0.1.9-0ubuntu1, 0.1.9.1-0ubuntu1), gvfs-daemons:amd64 (1.12.0-0ubuntu5, 1.12.0-0ubuntu6), hwdata:amd64 (0.233-1, 0.233-1ubuntu1)
End-Date: 2012-04-13  16:39:45