Comment 39 for bug 449255

Maxim N. Kostrikin, this issue is unreproducible in LibreOffice Writer via the Terminal:

cd ~/Desktop && wget https://bugs.launchpad.net/ubuntu/+source/openoffice.org/+bug/449255/+attachment/812873/+files/test%D0%99.odt && mv test?%99.odt example.odt && unoconv --listener && unoconv -f pdf example.odt && acroread example.pdf

Does this work for you?

lsb_release -rd
Description: Ubuntu 11.04
Release: 11.04

apt-cache policy libreoffice-writer
libreoffice-writer:
  Installed: 1:3.3.2-1ubuntu5
  Candidate: 1:3.3.2-1ubuntu5
  Version table:
 *** 1:3.3.2-1ubuntu5 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty-updates/main i386 Packages
        100 /var/lib/dpkg/status
     1:3.3.2-1ubuntu4 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty/main i386 Packages

apt-cache policy unoconv
unoconv:
  Installed: 0.3-6
  Candidate: 0.3-6
  Version table:
 *** 0.3-6 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty/universe i386 Packages
        100 /var/lib/dpkg/status

apt-cache policy acroread
acroread:
  Installed: 9.4.2-0natty1
  Candidate: 9.4.2-0natty1
  Version table:
 *** 9.4.2-0natty1 0
        500 http://archive.canonical.com/ubuntu/ natty/partner i386 Packages
        100 /var/lib/dpkg/status