Christopher Yeleighton, this issue is unreproducible in LibreOffice Writer via the Terminal:
cd ~/Desktop && wget https://bugs.launchpad.net/ubuntu/+source/openoffice.org/+bug/189229/+attachment/232136/+files/test.html && lowriter -nologo test.html
saw the expected 
Does this work for you? If using Lucid or Maverick feel free to perform at the Terminal:
sudo add-apt-repository ppa:libreoffice/ppa && sudo apt-get update && sudo apt-get -y upgrade && sudo apt-get -y install libreoffice-writer
lsb_release -rd Description: Ubuntu 11.04 Release: 11.04
apt-cache policy libreoffice-writer libreoffice-writer: Installed: 1:3.3.3-1ubuntu2 Candidate: 1:3.3.3-1ubuntu2 Version table: *** 1:3.3.3-1ubuntu2 0 100 /var/lib/dpkg/status 1:3.3.2-1ubuntu5 0 500 http://us.archive.ubuntu.com/ubuntu/ natty-updates/main i386 Packages 1:3.3.2-1ubuntu4 0 500 http://us.archive.ubuntu.com/ubuntu/ natty/main i386 Packages
Christopher Yeleighton, this issue is unreproducible in LibreOffice Writer via the Terminal:
cd ~/Desktop && wget https:/ /bugs.launchpad .net/ubuntu/ +source/ openoffice. org/+bug/ 189229/ +attachment/ 232136/ +files/ test.html && lowriter -nologo test.html
saw the expected 
Does this work for you? If using Lucid or Maverick feel free to perform at the Terminal:
sudo add-apt-repository ppa:libreoffice/ppa && sudo apt-get update && sudo apt-get -y upgrade && sudo apt-get -y install libreoffice-writer
lsb_release -rd
Description: Ubuntu 11.04
Release: 11.04
apt-cache policy libreoffice-writer dpkg/status 3.3.2-1ubuntu5 0 us.archive. ubuntu. com/ubuntu/ natty-updates/main i386 Packages 3.3.2-1ubuntu4 0 us.archive. ubuntu. com/ubuntu/ natty/main i386 Packages
libreoffice-writer:
Installed: 1:3.3.3-1ubuntu2
Candidate: 1:3.3.3-1ubuntu2
Version table:
*** 1:3.3.3-1ubuntu2 0
100 /var/lib/
1:
500 http://
1:
500 http://