Hi! I noticed that when pages with nolink tags are opened in MSIE on windows via the html editor (version with Moodle 1.2.1), it converts the <nolink> tag to <nolink />, which then doesn't stop linking anymore;-(.
So on linke 146 of the Glossary's filter.php I changed
preg_match_all('/<nolink \/>(.+?)<\/nolink \/>/is',$text,$list_of_excludes);
This seems to fix the problem. So with this change you type <nolink /> </noliink /> around terms you don't want autolinked and it will still work for folks who use MSIE and the editor.
If this hasn't been addressed in the latest version of Glossary, maybe it could be?