DOCBOOK-APPS: DOCBOOK: 1.60.1 xsl-stylesheets are overfull by exactly5.96419pt?

[Gary Lawrence Murphy <garym at canada dot com>]

This just seems too suspicious not to be something configurable that I
have either missed or messed up in my config: Every page of my
document, when passed through the xsl-stylesheets and into the current
pdfxmltex, reports being always and /precisely/ 5.96419pt vertically
overfull ...

sure enough if there's a header on the page, the font clearly
overwrites the underscore line under the doc-title by just that tiny
shade of a font size (ok, I can't be /certain/, but it /looks/ to be
at least 5.9pts ;)

it's a tiny amount, but it's a rock steady amount.  What's causing it?
Any recommendations on how I can fix it?  

Also, the params.xml file blows up my teTeX pool size (even at 750000)
Is a generated HTML format of this file online anywhere?  I didn't find
it in the XSL documentation on the website.

-- 
Gary Lawrence Murphy - garym@teledyn.com - TeleDynamics Communications
   - blog: http://www.teledyn.com/mt/ - biz: http://teledyn.com/ -
  "Computers are useless. They can only give you answers." (Picasso)