1)  README says "Free & Open source", but no license is included.  I'm not sure if copyright is granted automatically in the UK, but I believe it is.

2)  Copyright is claimed for 2003, but there are changes through April 2007

3)  Source files in src/ contain GPL headers, but GPL is not in tarball

4)  The contents of ORGANS appear unlicensed.  If the format of the files prevents a preface, some document somewhere should at least specify what license they use (a preface would be better)

5)  There is no COPYING file in the source (this may be a duplicate of #3)