Thanks a lot Chris!

On Ubuntu 10.4, with docbook2odf package installed, I tried:

git clone git://git.koha-community.org/kohadocs.git
cd es
docbook2odf manual.xml --output-file manual-es.odt --debug

And after 10' a 23MB ODF file is generated, but for some reason I can't open it with OpenOffice:

ooffice -view manual.odt  
  terminate called after throwing an instance of 'std::bad_alloc'   what():  std::bad_alloc

With AbiWord, after a while open it ("Some errors were encountered during the import."). I saved to another ODT and again trying to open with OpenOffice. This time it could, but it says it is corrupt and try to fix it.
Then I tried with another package, docbook-utils. Again, a lot of errors. A bunch of HTMLs with basic format, no colors and problems with images were generated.
jw manual.xml
  ...non SGML character number...
  ...maximum number of errors (200) reached...

Are we sure that manual.xml DocBook is perfectly correct?
Someone could do this successfully?

Cheers,
Pablo

PD: At least looks to be completely in UTF-8, as it should.