Hi Guillermo,
it's highly recommended to upgrade to Moodle 1.4.3+, because, with that version some differences between PHP versions and the whitespace bug was solved. If you encode your glossary XML files to UTF-8 and use Moodle 1.4.3+, everything should work fine.
Ciao
Glossary
Lost spaces while importing XML file to the Glossary
གྲོས་བསྟུན་འདི་བསྡམས་ཡོདཔ་ལས་ ལན་གསལ་བརྐྱབ་མི་ཚུགས་