REPOSITORY.root may not be NULL

Hi Philip,
I'm trying the 1.7 workaround now.

I created a new wc using the 1.7 client. When I run my script it fails
on svn move with the following message
svn: constraint failed
svn: REPOSITORY.root may not be NULL

I can do reproduce this with
cd A/D/H
svn move chi chi2
cd ..
svn move H h2
cd wc
svn commit

Reproduction script is attached. Is this a problem with my 1.7 client?
Thanks and Regards,
Onno