This is on "Mandriva Linux release 2011.0 (Official) for x86_64". (so not a bleeding edge release by any means...) I'm using the RPM distribution of 4.0.0.3 release, downloaded from libreoffice.org. Starting up libreoffice from the command line I noticed this: [my-sys]: libreoffice READ\ ME\ \(English\).doc /opt/libreoffice4.0/program/../ure-link/lib/libstdc++.so.6: version `GLIBCXX_3.4.11' not found (required by /usr/lib64/libproxy.so.1) Failed to load module: /usr/lib64/gio/modules/libgiolibproxy.so Since I didn't need a proxy it didn't cause any noticeable problem in running, but it might be stopping something. Moving that libstdc++.so.6 out of the way (so the standard system one was used) removed the error. Looks like the provided one is very old? It's GLIBCXX symbols go as far as GLIBCXX_3.4.9. The Mandriva ones (updated May 2012) go to GLIBCXX_3.4.16
The solution is to remove the package libreoffice4.0-stdlibs. It is should be installed only on too old systems. Anyway, this problem does not longer happen with 4.0.1 and newer releases. The recent 4.0.X builds are built on a newer system and the compat stdlibs is not longer provided.