Debian-specific: Libreoffice 4.* unattended-upgrade doesnt work

Hello!
My problem is: I'm using debian 6.*, 7.* and libreoffice 4.*.
I am upgrading all libreoffice packets via unattended upgrade (without user
interaction), but that doesnt work.
Output of 'unattended-upgrade --debug --dry-run' command shows following
lines: