I get the same behaviour with "mvn install". Just in case I:
a) removed the .m2/repository in my home directory
b) renamed the working directory that I had checked trunks/ out into
but still get the same problem.
Just to double check I went back to the working directory checked out
from the defunct SVN structure and a "mvn install" works fine there
still.
>From the observed behaviour it looks like a "last directory name
duplication" Maven2 bug when "Scanning for projects..." so I'll
attempt to investigate further on that basis.