I had a look at the xfce4-dev-tools but I think that Debian's ftpmasters will reject this if I upload it. Simply put, the files in m4macros and scripts just have Copyright (c) 2002-2005 The Xfce development team. All rights reserved. but no GPL boilerplate. As these are effectively the only source files in that package I don't think this will pass the Debian ftpmaster's tests. Can you add the boiler plate for the next beta please?
Sure, no problem.
Fixed with revision 21591. 2006-05-08 Benedikt Meurer <benny@xfce.org> * m4macros/, scripts/: Add GPL boilerplate. Bug #1786.