[Zope] Problem with TextIndexNG

Hi, I've created a TextIndexNG index, called "fulltext", which is a concatenation of two properties : Summary and PrincipiaSearchSource. In TextIndexNG creation form, I entered 'Summary,PrincipiaSearchSource as field name. My problem is that it seems that when one of the two properties is empty (or only contain a space or an empty string), the whole index property is empty. That's strange because if I enter specific words into one of the two properties (and keep the other one empty), they are visible into index the vocabulary. Any idea ?? Thierry -- Linux every day, keeps Dr Watson away... http://gpc.sourceforge.net -- http://www.ulthar.net