img src attributes are not made relative to the xdoc source

When running 'maven site' on maven, PDF errors are generated due to the xdocs/reference/developers/ide/eclipse/index.xml which references images in its own directory. the pdf plugin doesn't take into account the document directory, and issues errors:

[java] [ERROR] Error while creating area : Error while recovering Image Informations (file:/C:/source/maven/target/pdf/eclipse1.
png) : C:\source\maven\target\pdf\eclipse1.png (The system cannot find the file specified)
[java] [ERROR] Error while creating area : Error while recovering Image Informations (file:/C:/source/maven/target/pdf/eclipse2.
png) : C:\source\maven\target\pdf\eclipse2.png (The system cannot find the file specified)
[java] [ERROR] Error while creating area : Error while recovering Image Informations (file:/C:/source/maven/target/pdf/eclipse3.
png) : C:\source\maven\target\pdf\eclipse3.png (The system cannot find the file specified)
[java] [ERROR] Error while creating area : Error while recovering Image Informations (file:/C:/source/maven/target/pdf/eclipse4.
png) : C:\source\maven\target\pdf\eclipse4.png (The system cannot find the file specified)
[java] [ERROR] Error while creating area : Error while recovering Image Informations (file:/C:/source/maven/target/pdf/eclipse5.
png) : C:\source\maven\target\pdf\eclipse5.png (The system cannot find the file specified)
[java] [ERROR] Error while creating area : Error while recovering Image Informations (file:/C:/source/maven/target/pdf/eclipse6.
png) : C:\source\maven\target\pdf\eclipse6.png (The system cannot find the file specified)
[java] [ERROR] Error while creating area : Error while recovering Image Informations (file:/C:/source/maven/target/pdf/eclipse7.
png) : C:\source\maven\target\pdf\eclipse7.png (The system cannot find the file specified)

A fix is needed to fo-body.xslt somewhere....