PDF Bookmarks

Hi

My Docbook documents sometimes have <section>s in my chapters that need to have blank <title>s. When I compile to PDF, I get blank Bookmarks at those locations. ie. I get the little Acrobat icon under the Chapter Title but it has no text. <Section>s that do have title text are rendered correctly.

Is it possible to get the FO stylesheets to skip blank titles when creating bookmarks?

The same happens in the TOCs for the HTML stylesheets too I guess it's a generic issue...

Cheers
P.