DOCBOOK-APPS: Problems with JadeTeX 3.7: SpSFirstBackLeftHeader ignored

Hi,

In trying to track down a problem with my headers, I have determined 
that an SpSFirstBackLeftHeader is ignored by JadeTeX/pdfjadetex. The 
FirstBackLeftHeader is actualy produced by SpSOtherBackLeftHeader!

However, SpSFirstFrontRightHeader is handled correctly, but I don't know 
about SpSFirstFrontLeftHeader yet ...

How do I figure out why?

Regards
-------
Richard Sharpe, , LPIC1
www.samba.org, www.ethereal.com, SAMS Teach Yourself Samba
in 24 Hours, Special Edition, Using Samba