Quoting Jeremias Maerki on the fop-user mailing list, talking about some problem in FOP:

If the work-around doesn't work for you, you have several options:

• This is OpenSource, you can do it yourself.
• This is OpenSource, you can wait until someone has free time and thinks this is fun to implement.
• You can find/hire someone to do it for you.

Right on, Jeremias!