[ubuntu] LibreOffice upgrade

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http://ubuntuforums.org – I am running Ubuntu 11.04. I would like to upgrade my LibreOffice 3.4.3 to LibreOffice 3.4.5 which is out since 2012-01-16. I have the repository ppa.launchpad.net/libreoffice/ppa/ubuntu in Synaptic yet when I check for updates LibreOffice isn't there. I have also tried 'apt-get upgrade libreoffice' with no luck, I get 0 upgraded, 0 installed etc. Is there any way to upgrade LibreOffice without un-installing and re-installing it?? (Hardware)